List Of All Extensions And Filetypes - G

This is an easy approach from me to give and describe each and every filetype and extension as much as possible.
here is the list for the information about various filetypes and extensions starting from alphabet G

Extension	Information
G	Gravity News Database
G	BRL-CAD Geometry File [Native BRL-CAD Format] (BRL-CAD Development Team and US Army)
G	Garabatos Genome File
G	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
G	Paradox File
G	Cliq Accessories Datebook Schedule Group
G	Ashton Tate Applause Chart
G	ANTLR Options File (Terence Parr and Colleagues)
G++	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
G01	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
G01	MicroSim PCBoard Photoplot Artwork File (Cadence)
G02	MicroSim PCBoard Photoplot Artwork File (Cadence)
G02	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
G03	MicroSim PCBoard Photoplot Artwork File (Cadence)
G03	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
G04	MicroSim PCBoard Photoplot Artwork File (Cadence)
G04	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
G05	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
G05	MicroSim PCBoard Photoplot Artwork File (Cadence)
G06	MicroSim PCBoard Photoplot Artwork File (Cadence)
G07	MicroSim PCBoard Photoplot Artwork File (Cadence)
G08	MicroSim PCBoard Photoplot Artwork File (Cadence)
G09	MicroSim PCBoard Photoplot Artwork File (Cadence)
G10	Garmin GPS Map File (Garmin Ltd.)
G10	MicroSim PCBoard Photoplot Artwork File (Cadence)
G16	GoldED / DOS Compiled Configuration
G18	Recomposer MIDI Sequencer Music File
G1A	Casio Model 9860 Add-in (Casio Computer Co., Ltd.)
G1E	Casio Model 9860 eActivity (Casio Computer Co., Ltd.)
G1L	Casio Model 9860 File (Casio Computer Co., Ltd.)
G1M	Casio Model 9860 BASIC Program (Casio Computer Co., Ltd.)
G1N	Casio Model 9860 File (Casio Computer Co., Ltd.)
G1R	Casio Model 9860 Image File (Casio Computer Co., Ltd.)
G2A	GoToAssist Session File (Citrix Online, LLC.)
G3	G3 FAX File
G32	GFA BASIC 32 Program File
G32	PaperPort Application Link File (32-bit) (ScanSoft Inc.)
G36	Recomposer MIDI Sequencer Music File
G3D	GenDesigner 3.x Genealogy Database
G3F	Zetafax Fine Resolution TIFF File (Equisys)
G3N	Zetafax Normal Resolution TIFF File (Equisys)
G3S	Goletas 3S Triangle Studio Project (Maksim Goleta)
G3X	RealFlight Radio Control Photofield File (Knife Edge Software)
G4	Access (Microsoft Corporation)
G4	GTX RasterCAD File
G42	DLS/32 Supply Chain Planning (Adapta)
G4B	Sokoban++ Level File
G53	DLS/32 Supply Chain Planning (Adapta)
G64	C64 Emulator Disk Image
G8	PicLab Plane Three Graphics
G8	PictureMaker Green Channel Image Data (Cubicomp)
G9	Gest Data File (Arktec, S.A.)
G99	HEC-RAS Geometry File (U.S. Army Corps of Engineers)
GAB	WINDEV Controls' Styles Description (PC SOFT)
GAB	Connectivity Memory Model Axo-axonic Connections Onto Presynaptic Terminals Input File
GAB	Global Address Book Export File (Dencom)
GAC	Global Audio Control Skin
GADGET	Microsoft Gadget (Microsoft Corporation)
GAF	Total Annihilation
GAK	Win32 Shellext File
GAL	Gallery of Pictures
GAL	Hewlett-Packard Graphics Gallery
GAL	GenePix Array List (Molecular Devices Corporation)
GAL	Corel Multimedia Manager Album
GALLERYITEM	SMART Notebook (SMART Technologies ULC)
GAM	MacMolPlt GAMESS Input format
GAM	Vectrex Game
GAM	RPG Toolkit Game Project (Christopher Matthews)
GAM	Astro-PC Astrology Data File (Aureas Software & Publishing)
GAM	The Games Factory Game (Clickteam)
GAM	Cyberboard Game (Dale Larson)
GAM	Infinity Game Engine Saved Game (BioWare Corp.)
GAM	Dark Engine Games (Looking Glass Studio)
GAM	Rise of Nations Saved Game (Microsoft Corporation)
GAM	Tasc Chess CD II Saved Game (Tasc)
GAM	Baldur's Gate Game File
GAM	GammaFax Fax Document
GAM	Klik'n'Play Game (Clickteam)
GAM	TADS Ver. 2.x Game File
GAME	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAMES	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAML	Generalized Analytical Markup Language
GAN	GanttProject Project Plan File
GANI	Graal Game Animation
GAP	Electrical Generation Analysis and Planification
GAR	GPS_COM Waypoint Data (AviaDBM)
GARDE	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAS	Grab-a-Site Project File (BlueSquirrel)
GAS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAS	Intelligence Tracking System Data File
GAT	Genetic Algorithm Timetabler (GATTer) Configuration and Information File (Chris Skardon)
GAT	Gator File
GAU	Flight Simulator Gauge (Microsoft Corporation)
GAU	Gaussian Input File (MDL Information Systems, Inc.)
GAUSS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAUSS2	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GAX	Age of Empires II: The Conquerors Expansion Saved Game (Microsoft Corporation)
GAX	Rise of Nations Saved Game (Microsoft Corporation)
GAY	Reported as Sometimes a Porn File
GB	GenBank Sequence Record
GB	Printfox/Pagefox Graphic
GB	Nintendo GameBoy Emulator ROM Image File (Nintendo)
GB	CEDICT Chinese/English Dictionary (Erik E. Peterson)
GB$	BASIC VB Beispiel Kartei File
GB1	Game Maker Backup (YoYo Games Limited)
GBA	Nintendo Game Boy Advance ROM Image (Nintendo)
GBA	GrabIt Batch Files
GBC	Nintendo GameBoy Color Emulator ROM Image File (Nintendo)
GBD	Great Budget Budget Definition File (Great Budget Software)
GBD	Gator Banner File
GBF	Great Budget Fringe Definition File (Great Budget Software)
GBF	InteGrade Pro Gradebook File
GBF	GTrek GPS Binary File (GTrek Ltd)
GBFS	GBFS Archive (Pin Eight)
GBI	gBurner Image (gBurner Systems, Inc.)
GBK	Interbase Database Backup
GBL	Gravityball File (William D. Hause)
GBL	Visual Basic Global Definition
GBL	VAXTPU Global Definitions
GBOOK	The Guest Book Egbook file
GBR	GIMP Brush File (The GIMP Team)
GBR	Gerber Format File
GBS	Gameshark Online Save/Snapshot
GBS	Nintendo Gameboy Music/Audio Data (Nintendo)
GBS	GTrek Collective GPS Binary File (GTrek Ltd)
GBSCR	GreenBlue Services Script (Ecyware)
GBT	Photoshop (Adobe Systems Incorporated)
GBX	Cyberboard Gamebox (Dale Larson)
GBX	Gerber File
GBX	Great Budget Budget File (Great Budget Software)
GBX	Game Data Package
GBX	Nadeo Games File Format (Nadeo)
GC	Sierra Print Artist Greeting Card
GC1	Golden Common Lisp 1.1 Source Code
GC3	Golden Common Lisp 3.1 Source Code
GCA	GOCA Graphics File
GCA	G Compression Archiver Compressed File
GCB	Guitar Chord Buster
GCC	VISUAL EPR COSEUL.EXE Result
GCC	Gnu C++ File
GCD	CD Ghost Task
GCD	Generic CADD Drawing
GCD	GNUe Class Definition
GCD	GraphiCAD Data File (GraphiTech Ltd.)
GCD	General Content Descriptor (Sprint Nextel)
GCD	Prassi CD Image (Prassi Technology)
GCF	Valve Game Cache File (Valve Corporation)
GCF	Graphing Calculator (Pacific Tech)
GCF	Half-Life Game Cache File (Sierra Entertainment, Inc.)
GCF	WinXComp Grouped Compressed File
GCF	Scream! Guralp Compressed Format (Güralp Systems Ltd.)
GCF	Greeting Card Creator Project (ArcSoft)
GCF	Global Virtual Accademy GVA XT Author File
GCG	GCG 8 Sequence Chemical File
GCI	Sonic Adventure DX Saved Game File (Sega of America, Inc.)
GCI	GTA2 Game File
GCI	Visual EPR COSEUL.EXE Result
GCK	Giants: Citizen Kabuto Customized Map (Planet Moon Studios)
GCK	NICET Fire Alarm Test-Prep Software Tracking File (Zenith Design Group, Inc.)
GCM	GameCube Image File (Nintendo)
GCM	GeoConcept Map File (GeoConcept SA)
GCM	Group Mail CMessage Store File
GCO	Genbox Family History Chart Options (Thoughtful Creations)
GCP	Ground Control Point File
GCP	Spectramap Group Properties (Coloritto BV)
GCR	GlowCode Profiling Results (Electric Software, Inc.)
GCR	Visual EPR COSEUL.EXE Output
GCS	GameShark SharkSave for GameCube
GCT	ApplinX Screen Scrapper
GCV	3D SexVilla Game Movie (thriXXX)
GCX	Grapher Graph Formula and Specifications (Apple Inc.)
GD2	GDLib Image
GD3	GreatFamily Family Tree Project (GreatProgs)
GDA	[Unknown]
GDA	Unix Man Page Guide
GDB	MoneyWorks Main Database (GenSoft Ltd.)
GDB	Firebird Database (Firebird Foundation Incorporated)
GDB	MapSource GPS Waypoint Database (Garmin Ltd.)
GDB	GardenBoss Design File (RedBog Software)
GDB	ArcView Geodatabase (ESRI)
GDB	Interbase Database
GDB	Group Mail File
GDB	Formula 1 Car Race 2001 Season01 File
GDB	GetPicturesList Image Location Database (Tracking-Celebs.info)
GDB	GVA2000 Author Lecture (Youngsan Info & Communication Co., Ltd.)
GDB	ACT! Group Data File (Best Software CRM Division)
GDB	ProMaster Key Manager Key Management Database (Westorn House Software)
GDF	GlossTeX Definition File
GDF	GRAFIK Eye Designer Project File (Lutron Electronics, Inc.)
GDF	Quartus II Graphic Design File (Altera Corporation)
GDF	IBM Graphics Data Format Bitmap
GDF	GEOS Dictionary
GDF	3DMove 3D Geological Model (Midland Valley Exploration)
GDF	FutuRUG Group Definition File (Two Brothers Software)
GDG	ReliaSoft RG
GDI	Generic Download Install File (SamattRPG Technologies)
GDK	OS/2 Saved SKF Format File (IBM)
GDM	Bells, Whistles, and Sound Boards Module
GDP	Scrolling Game Development Kit Project File (Benjamin Marty)
GDR	SymbianOS Bitmap Font File
GDR	GRAFIK Eye Designer User Information (Lutron Electronics, Inc.)
GDS	Image File
GDS	Chip Layout Information
GDS	McDonnell-Douglas Things
GDT	Guitar & Drum Trainer Song Configuration File (Renegade Minds)
GDT	Genbox Family History Dictionary (Thoughtful Creations)
GDW	gINT Drawing (gINT Software, Inc.)
GDW	GedStar Pro Configuration (GHCS Software)
GE	Gecho Configuration File
GE3	Mastercam Geometry File (CNC Software, Inc.)
GE3	Mastercam Mill Tool Library (CNC Software, Inc.)
GE80	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEA	Fifa World Cup Game Data fe Art Legalscr File
GEANT	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEAR	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEB	DR Hardware File
GED	Graphic Environment Document
GED	GoldED / DOS Compiled Configuration File
GED	Wicat Image
GED	GEDCOM Family History File
GED	Micrografx Simply 3D Geometry
GED	EnerGraphics File
GED	Arts & Letters Graphics (Arts & Letters Corporation)
GED	Game Editor Project File (Game Editor)
GED	Family Historian Native Data Format (GEDCOM File) (Calico Pie Limited)
GEDCOM	Various Programs Data File
GEDTD	Get 'em Done ToDo Data File (StudyLamp Software)
GEF	Geotechnical Exchange Format (GEONET)
GEF	GE Industrial Systems CIMPLICITY Workbench
GEF	Graphics Exchange Format
GEM	Ventura Publisher Vector Graphics
GEM	GEM File
GEM	Digital Research GEM Paint
GEM	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEN	Genesis (Mega Drive) Game ROM Backup File
GEN	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEN	Daqarta Extended Audio Data (Interstellar Research)
GEN	Ventura-Generated Text File
GEN	Genius Family Tree Data
GEN	dBASE Application Generator Compiled Template
GEN	Chromeleon Generic Driver Configuration
GEN	ArcView ARC/INFO UnGenerate Format (ESRI)
GEN	Generations Embroidery Software Design File (Notcina Corporation)
GEN	ToGenBank Format
GENERAL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GENIE	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GENKEY	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEO	VideoScope File
GEO	Trumpf ToPs File
GEO	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEO	VideoScape 3D Object
GEO	eXplorist GPS Geocache Manager Database File (Thales Navigation, Inc.)
GEO	GeoPaint
GEO	Homeworld Geometry File (Sierra)
GEO	GoldED / OS/2 Compiled Configuration File
GEO	GeoSoft Compressed Add-on
GEO	Geoworks Geode
GEOG	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GER	Pro/ENGINEER Temporary File (PTC)
GER	German Text/HTML Info File
GER	GerberView File
GERMAN	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GESTION	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GET	Pov-ray for Windows (Persistence of Vision Raytracer Pty Ltd.)
GET	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GETBILL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GETRIGHT	GetRight Download in Progress (Headlight Software, Inc.)
GETVERS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GEX	GEcho Configuration File
GF	METAFONT Generic Font File
GF	Geometric Data
GF	Starfleet Command - Empires At War File
GF	Pilot Logbook for Grok File
GF	FlowerThinger Garden File (PingerThinger.com)
GF	gFx UNIX Plotting Program
GFA	GFA-BASIC 32 ATARI Tokenized Source Ver. 2.x (GFA Software Technologies)
GFA	GFA-BASIC MS-DOS Tokenized Source (GFA Software Technologies)
GFA	GFA-BASIC 32 ATARI Tokenized Source Ver. 2.x (Protected) (GFA Software Technologies)
GFA	Bitmap Graphic
GFB	GIFBlast Compressed GIF Image
GFC	Patton & Patton Flowcharting 4 File
GFD	GeForms (Gadwin Systems, Inc.)
GFD	Menus for GNUe Forms
GFD	VISUAL EPR Energy, Fields File
GFF	SignalMap Gene-Finding Format (GFF) Data File (NimbleGen Systems Inc.)
GFI	Genigraphics Graphics Link Presentation
GFL	GeForms (Gadwin Systems, Inc.)
GFM	Computer Graphics Meta-file
GFM	Ashton Tate Applause CGM Picture
GFO	SGI Radiosity
GFS	GGFileSPlit File Fragment (GGNetworks)
GFS	Immersioni Underwater Decompression File (Mario Giuseppe Leonardi)
GFS	Office Groove Partial Download File (Microsoft Corporation)
GFT	GSP Family Tree (Global Software Publishing Limited)
GFT	NeoPaint Font
GFT	GeForms Form Template (Gadwin Systems, Inc.)
GFW	BASIC GFA File
GFW	ArcView World File For GIF Image (ESRI)
GFX	RSView Machine Edition Graphics Display (Rockwell Automation, Inc.)
GFX	WarCraft II Image File (Blizzard Entertainment)
GFX	Print Artist
GFX	Genigraphics Graphics Link Presentation
GFX	Cue Club Image File
GFX	Instant Artist image
GFX	The Games Factory Extension (Clickteam)
GFY	Grafical 1.0 File
GG	Sigmac Compiled Machine Code
GG	Sega GameGear Game ROM Image (Sega of America, Inc.)
GG	Koala Paint Compressed File
GG	Google Desktop Gadget (Google)
GG	Gridgen File
GG	Gridgen Grid (Pointwise, Inc.)
GG1	Goofy Golf Deluxe Course
GG2	Goofy Golf Deluxe Saved Game
GGDB	GGNetworks Database (GGNetworks)
GGE	Green Globs & Graphing Equations Saved Graphing Equations (Dugdale and Kibbey Consulting)
GGF	GPS Pathfinder Office Geoid Grid File (Trinble Navigation Limited)
GGG	Green Globs & Graphing Equations Record Games and License Information (Dugdale and Kibbey Consulting)
GGI	GGI Extension
GGM	Green Globs & Graphing Equations Partial or Complete Saved Game (Dugdale and Kibbey Consulting)
GGP	GemCom Graphic Format
GGR	GIMP Gradient (The GIMP Team)
GGS	Gameboy Emulator File
GGX	Green Globs & Graphing Equations List of GGG Records Files (Dugdale and Kibbey Consulting)
GHI	NCSA Mosaic Configuration File
GHO	Ghost Disk Image File (Symantec Corporation)
GHOST	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GHS	Glider Pro House File (John Calhoun)
GHS	Tarshare File
GHS	Ghost Disk Image Span File (Symantec Corporation)
GHS	Lasertank High Scores
GI	Audio Utility Tuningwrench Compressed File
GI	Sony CD Extreme Global Image File
GI	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GI	Sonic RecordNow! CD Image (Hewlett-Packard Development Company, L.P.)
GI	Prassi or PrimoDVD Image
GIB	Graph-in-the-Box Chart
GIC	BioWare Aurora Engine Area (BioWare Corp.)
GID	GiD Project Directory (CIMNE (The International Center for Numerical Methods in Engineering))
GID	Windows Help Index File (Microsoft Corporation)
GIF	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GIF	Graphic Interchange Format
GIF2	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GIF2	Netobjects Fusion Styles Lines File
GIF87	GIF87 File
GIF89A	Gif 89a Image File
GIFA	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GIFAR	GIF With Java ARchive
GIFENX	egis Encrypted GIF File (HiTRUST Inc.)
GIFF	Graphic Interchange Format
GIG	GigaStudio Sound Bank (TASCAM)
GIH	GIMP Animated Brush (The GIMP Team)
GIL	GILS Document
GILS	GILS Document
GIM	Playstation 3 Icon File (Sony Corporation of America)
GIM	Genigraphics Graphics Link Presentation
GINT	Gintor Download Assistant Control File
GIO	Nyquist V2.10 Test File
GIR	Gens Plus! Movie Capture
GIRL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GIS	ERDAS IMAGINE Gray-scale Bitmap Image (Leica Geosystems , LLC)
GIT	BioWare Aurora Engine Area (BioWare Corp.)
GIW	Graph-in-the-Box Presentation
GIX	Genigraphics Graphics Link Presentation
GJD	GetJet Professional Database
GJD	7th Guest Game Archive
GJD	11th Hour Game Archive
GJF	Gaussian Input Data File
GJT	GAJET Input Data File (UK Health and Safety Laboratory)
GKA	GKWIN (Matsushita Electric Works UK Limited)
GKB	General Knowledge Base Database (Baltsoft)
GKH	Ensoniq EPS Family Disk Image (E-MU Systems)
GKS	Gravis GripKey Document
GKS	Graphics Kernel System
GL	GRASP - Graphical System for Presentation File
GL	GALink Script
GL3	Green Line File
GLADE	Glade User Interface Design
GLB	Global Module in Basic Program
GLB	Raptor: Call Of The Shadows Support File
GLD	The GUI Loft Design (Johan Lindström)
GLD	Glide File
GLF	Grantleigh Labels
GLF	Gridgen Tcl Script (Pointwise, Inc.)
GLF	AfterGRASP Font (John Bridges)
GLF	Golf Save File
GLF	iGolf Golf Course File (L1 Technologies)
GLF	Pointwise Tcl Script (Pointwise, Inc.)
GLG	MicroSim PCBoard Photoplot Job Description File
GLH	Wise Installer Temporary File (Wise Solutions)
GLI	GLHEPRO Input Data (James R. Cullin - Oklahoma State University)
GLK	PaperPort Application Link File (16-bit) (ScanSoft Inc.)
GLM	DInsight Modeling Studio 3D CAD Model (DInsight)
GLM	Glim Data File
GLO	Global Module in Basic Program
GLO	LaTeX Auxiliary for Glossary
GLO	Instant Text Glossary File (Textware Solutions)
GLOBAL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GLOBALS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GLOSS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GLOSSARY	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GLOSSARYASP	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GLS	Sothink Glenda Export Shape File
GLS	GLScript Game/Animation Script File
GLS	Babylon Builder
GLS	Across Data
GLT	Sothink Glenda File
GLU	Cyberglue File
GLUE	GlueMon Song/Module
GLUT	OpenGL Glut-3.6 File
GLUT2	OpenGL Glut-3.6 File
GLUT3	OpenGL Glut-3.6 File
GLV	Glove Data File (New Planet Software)
GLY	ACT! Layout (Best Software CRM Division)
GLY	Word Glossary (Microsoft Corporation)
GM	Autologic Bitmap
GM	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GM	Transport Tycoon Game Music File
GM0	S.A.P.S. - Sharp Advanced Presentation Software Professional
GM1	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM1	S.A.P.S. - Sharp Advanced Presentation Software Professional
GM2	Gens Sega Genesis Emulator Movie Capture Format (Mysticales)
GM2	Autologic Bitmap
GM2	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM2	S.A.P.S. - Sharp Advanced Presentation Software Professional
GM3	S.A.P.S. - Sharp Advanced Presentation Software Professional
GM3	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM4	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM4	S.A.P.S. - Sharp Advanced Presentation Software Professional
GM4	Autologic Bitmap
GM5	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM6	Game Maker Project File (YoYo Games Limited)
GM6	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM7	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM8	Heroes of Might & Magic III Saved Game (The 3DO Company)
GM9	Heroes of Might & Magic III Saved Game (The 3DO Company)
GMA	S.A.P.S. - Sharp Advanced Presentation Software Professional
GMANIFEST	Google Desktop Gadget Control File (Google)
GMAX	gmax Game Creator (Autodesk, Inc.)
GMB	Great Budget Model (Template) File (Great Budget Software)
GMB	GoldMine Business Contact Management Backup Data (FrontRange Solutions Inc.)
GMD	IMAGINE Graphical Model (Erdas)
GMD	Game Maker Stored Game Under Development (YoYo Games Limited)
GMD	Great Budget Model Definition for the Template (Great Budget Software)
GME	Interact DexDrive Playstation Memory Card Save
GME	Multi Game Memory Editor Main Game File (Opencoding.net)
GME	GunBound Main GunBound Executable (Softnyx)
GMF	Great Budget Fringe Definition for the Template (Great Budget Software)
GMF	Robot Arena: Design & Destroy Graphic (Gabriel Group, Inc.)
GMF	Applause CGM Graphics
GMI	GPS Tuner Map Calibration Data (Megalith-Systems)
GMIN	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GMK	Game Maker Project File (YoYo Games Limited)
GML	NetRemote XML-based Configuration File
GML	Graphlet Graphscript File
GML	Geography Markup Language
GML	Game Maker Script (YoYo Games Limited)
GMLWB	Garry's Mod Lua Weapons Builder Project File (Happymax)
GML_BBCRSSINTCLUSTER	BBC Alerts (BBC)
GMM	Group Mail Message Log File
GMM	GMT Player Live Media Feed (GGMMTV Ltd.)
GMMOD	Model Creator Game Maker Model File (Matrebatre)
GMMP	Windows Color System Gamut Map Model Profile (GMMP) (Microsoft Corporation)
GMO	GNU Gettext GNU Machine Object File (Free Software Foundation)
GMP	Railroad Tycoon 3 Scenarios and Saved Games (PopTop Software Inc.)
GMP	GTA2 Game File
GMP	Group Mail List Information File
GMP	Geomorph Tile Map
GMP	GUEmap Document (Christopher J. Madsen)
GMR	Schlafhorst Automation Graphical Monitor Record
GMR	Game Maker Compiled Game (YoYo Games Limited)
GMS	Corel Global Macro File
GMS	Corel Graphics10 Draw File
GMT	Scarlett Expert System Compiler Grammar File
GMT	GMT Player Live IPTV Feed (GGMMTV Ltd.)
GMV	GMV (General Mesh Viewer) Input File (Los Alamos National Security, LLC)
GMV	Cyberboard Move (Dale Larson)
GMV	Gens Movie Capture
GMX	Group Mail Message File
GNA	Genigraphics Graphics Link Presentation
GNE	Flickr PHP File (Yahoo! Inc.)
GNH	GravoStyle Engraving Software (GravoGraph)
GNI	VisiDAQ Strategy File (Visidaq Solutions, Inc.)
GNM	Generator GNM Output Log/Music
GNO	Genopro Genealogy Document File (Genogram) (GenoPro Inc.)
GNO	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GNT	Micro Focus Generated COBOL Code
GNUMERIC	Gnumeric Default XML-based File (GNOME Foundation)
GNUPLOT	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GNX	Genigraphics Graphics Link Presentation
GO	CompuServe (CompuServe)
GO	Icy Tower 1.3 Game file (Free Lunch Design)
GO	GraphOn Bitmap Image
GO1	Wingames Go File
GOA	SpiceCAD File
GOAL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOB	Jedi Knights Game Archive (Lucasfilm Entertainment Company Ltd.)
GOB	Dark Forces Game Archive (Lucasfilm Entertainment Company Ltd.)
GOB	Indiana Jones 3D Game Archive (Lucasfilm Entertainment Company Ltd.)
GOBJ	Geoworks Object Code
GOC	Geoworks GOC Source Code
GOD	Payvision BV Gamelauncher Games on Demand Volume (Payvision)
GODD	G.O.D Arena Partial Downloaded Game File (Games On Demand ( Australia ) Pty. Ltd. (G.O.D))
GOE	McIDAS System Satellite Image Data
GOES	McIDAS System Satellite Image Data
GOGO	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOH	Geoworks GOC Header
GOLD	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOLDFONT	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOLF	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOO	Kai's Power Goo / Kai's Supergoo
GOODBYE	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOODE	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOODNESS	Goodness File
GOODS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOOK	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOR	Gorilla
GOTHIC	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GOULD	Gould Scanner Bitmap
GOV	Netmino File
GOX	The Games Factory Extension (Clickteam)
GP	Geoworks Glue Geode Parameter File
GP	Gofer Project
GP1	Gerber Printed Circuit File
GP1	Street Atlas GPS Log (Delorme)
GP3	CCITT Group 3 File
GP3	Guitar Pro Ver. 3 Tablature (Arobas Music)
GP4	Guitar Pro Ver. 4 Tablature (Arobas Music)
GP4	CCITT Group 4 File
GP4	GTX Group IV Format /CALS Picture
GP5	Guitar Pro Ver. 5 Tablature (Arobas Music)
GPD	Generic Printer Description Unidrv Minidriver (Microsoft Corporation)
GPD	VISUAL EPR Input Data for PARAMS.EXE
GPF	Ragnarok Online Gravity Re-Packed File (Gravity Co., Ltd. & Lee Myoungjin)
GPG	GNU Privacy Guard (GnuPG) Public Keyring (Free Software Foundation, Inc.)
GPH	Stata Graph
GPH	1-2-3 Graph (IBM)
GPH	Freelance Graphics for OS/2 (IBM)
GPH	Pro/ENGINEER (PTC)
GPI	Garmin Point of Interest File (Garmin Ltd.)
GPI	Bitware Fax File
GPJ	Autorun-Autoplay Tools Project File (GS Technology Works LLC dba GS Technologies)
GPJ	Grapher Project File (Golden Software, Inc.)
GPJ	Grapher Worksheet Project (Golden Software, Inc.)
GPJ	jGRASP Project Metadata (Auburn University)
GPJ	Xpower Project (PaulMace Software Inc.)
GPJ	gINT Project File (gINT Software, Inc.)
GPK	GEOPAK Coordinate Geometry Database (Bentley Systems, Incorporated)
GPK	WaveLab Peak File (Steinberg)
GPK	Geos Compressed Omnigo File Archive
GPK	Omnigo Program Package
GPL	GetPicturesList URL Conversion Rule (Tracking-Celebs.info)
GPL	GPS Log File
GPL	XMap GPS Log File (Delorme)
GPL	GenePix Lab Book (Molecular Devices Corporation)
GPLT	Gnuplot Plot Files
GPM	Crossword Puzzle
GPN	GlidePlan Map Document (GlidePlan Inc.)
GPN	gp-Untis Timetable Database (Gruber & Petters GmbH)
GPP	GraphPap Graph Paper File
GPP	Serif GraphicsPlus Object
GPR	VISUAL EPR PARAMS.EXE Results
GPR	GenePix Results (Molecular Devices Corporation)
GPR	GMS Project File (Environmental Modeling Systems, Inc.)
GPS	BPM Studio File/Play List Structure (ALCATech)
GPS	MicroImages GPS Log File (MicroImages, Inc.)
GPS	Pocket CoPilot GPS Tracks Data File
GPS	GenePix Settings (Molecular Devices Corporation)
GPS	Tripod Data Systmes Survey Pro GPS Coordinate File
GPT	MicroImages Text Group (MicroImages, Inc.)
GPT	MOPAC Graph File (CambridgeSoft Corporation)
GPX	Garmin GPS eXchange Data Format (Garmin Ltd.)
GPX	BASIS File
GPX	GPS eXchange Format (TopoGrafix)
GPX	GraphX Document (FlexSoft)
GPZ	Msdev Common Ide Utility Projects File
GQ	QLFC Compressed Archive
GQ	Epson Printer Page Description Language (Epson Corporation)
GQA	BI/Query Data Model Admin Layer
GQL	BI/Query Data Model
GQU	BI/Query Data Model User Layer
GR	XGMML (eXtensible Graph Markup and Modeling Language) File
GR2	Windows 3.0 Screen Driver
GR2	Granny Game Content File (RAD Game Tools, Inc.)
GR3	Windows 3.0 Screen Grabber
GR4	Pathloss Network File Sharing File
GRA	Notes 5 Language Dictionary File (IBM)
GRA	STN Express Transcript Graphics File
GRA	SigmaPlot Data File
GRA	Graph Chart (Microsoft Corporation)
GRA	Flight Simulator File (Microsoft Corporation)
GRA	OpenGL Object
GRAAL	Graal Level (Cyberjoueurs)
GRABBER	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRAD	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRADE1FONT	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRADS	Metafile
GRAFFLE	OmniGraffle Drawing (The Omni Group)
GRAFSAO	Aleph One Shapes (Marathon Open Source)
GRAPH	Amaya
GRAPHICS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRAPHLI	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRASP	Animation
GRAY	Raw Gray Samples
GRB	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRB	Gridded Binary Image
GRB	HP-48sx Calculator GROB Graphic Object
GRB	HP-48/49 GROB
GRB	MS-DOS Shell Monitor
GRBDROPFILE	GetRight (Headlight Software, Inc.)
GRD	3D Garden Composer Design File (DiComp, Inc.)
GRD	RockWorks Evenly-spaced XYG Data (RockWare, Inc.)
GRD	Photoshop Gradient File (Adobe Systems Incorporated)
GRD	Drivers for GRX
GRD	StrongDisk Encrypted Disk Image (PhysTechSoft Ltd.)
GRD	Golden Software Surfer
GRD	Gradebook Power File
GRD	Grid File
GRDEF	Geoworks UI resource file
GRE	Webalizer.01 Language File
GREY	RAW RGB 24-bit Graphic
GRF	DPlot Graph File (HydeSoft Computing, LLC)
GRF	Stanford Image
GRF	Graph Plus Drawing (Corel)
GRF	GraphEdit Filter Graph (Microsoft Corporation)
GRF	Insight II Standard Graph Definition File (Accelrys Software Inc.)
GRF	Ragnarok Online Game Archive (Gravity Co., Ltd. & Lee Myoungjin)
GRF	Grafix Idea File
GRF	Graph
GRF	Golden Software Graph File
GRF	DLG Graphic Format
GRF	Level Up! Site Information File (Level Up!)
GRF	Ragnarok Packed File (Gravity Co., Ltd.)
GRFZ	DPlot Graph File (HydeSoft Computing, LLC)
GRG	GreatFamily Graphic Gallery (GreatProgs)
GRIB	Gridded Binary
GRID	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRK	Gradekeeper Class Gradebook (Daniel Ethier)
GRK	Kreon Scanner File
GRL	MATLAB Graphic Format (The MathWorks, Inc.)
GRM	Minos File
GRM	VISUAL EPR Input Data for FIntGraf
GRN	Drivers for GRX
GRN	Granny 3D Rendering Program
GRN	Masterpoint Green Points File (ABF Masterpoint Centre)
GRO	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GRO	HP-48/48sx/49 Graphic Object Bitmap (Hewlett-Packard Development Company, L.P.)
GRO	Genbox Family History Report Options (Thoughtful Creations)
GRO	Serious Sam Game File (Croteam Ltd.)
GRO	Warlords Battlecry Archive (Strategic Studies Group, Pty Ltd.)
GROB	HP-48/48sx/49 Graphic Object Bitmap (Hewlett-Packard Development Company, L.P.)
GROOVY	Groovy (programming language) script file (JCP)
GRP	PixBase Pictures Group
GRP	Shadow Warrior Archive
GRP	Starcraft Archive
GRP	DESQview (Symantec Corporation)
GRP	Windows Program Manager Group
GRP	Duke Nukem 3D Archive
GRP	BPM Studio File/Play List Archive (ALCATech)
GRP	ACT! Group Data File (Best Software CRM Division)
GRPH	ANSYS Plot
GRQ	Quickstep Barco Graphics
GRR	Gradekeeper Class Roster (Daniel Ethier)
GRS	GetRight Skin (Headlight Software, Inc.)
GRS	Packedge Barco Graphics
GRT	VISUAL EPR Calculation Results of Fields
GRT	MegaHAL Greeting File (Ai Research)
GRV	Cakewalk (Cakewalk)
GRV	Groove Networks File
GRW	SeeYou Waypoint (Naviter)
GRX	GetRight File List (Headlight Software, Inc.)
GRXML	Speech Recognition Grammar Specification (W3C)
GRY	RAW RGB 24-bit Graphic
GRZ	GRZip II Compressed Archive
GRZ	GRZip Compressed Archive
GS	eXplorist GPS Geocache Waypoint File (Thales Navigation, Inc.)
GS	Gofer Script
GS	GemStone Model Document (Verity Software House)
GS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GS0	Genecyst Save State 0
GS1	GraphShow Presentation
GS1	Genecyst Save State 1
GS2	Genecyst Save State 2
GS3	Genecyst Save State 1
GS4	Genecyst Save State 4
GS5	Genecyst Save State 5
GS6	Genecyst Save State 6
GS7	Genecyst Save State 7
GS8	Genecyst Save State 8
GS9	Genecyst Save State 9
GSA	GeneStudio Alignment File (GeneStudio, Inc.)
GSAGA	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSALB	GSAlbumer Album file (Krzysztof Krzewniak)
GSB	GeneSys Battery File (Psytech International)
GSB	Gain Script Binary (AIM Software)
GSB	Golden Software Boundary Data (Golden Software, Inc.)
GSBUG	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSC	GeneStudio File
GSC	IMail Server Web Messaging File (Ipswitch, Inc.)
GSD	Professional Draw Vector Graphics
GSD	GSM Internet Realtime Audio
GSD	GSplit Piece File (G.D.G. Software)
GSD	GraphTec Vector Graphic Data (GraphTec)
GSDB25	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSDIN8	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSE	GeneSys Export File (Psytech International)
GSE	IMail Server Returned Mail (Ipswitch, Inc.)
GSF	Gedemin Settings File (Golden Software of Belarus, Ltd)
GSF	Golf Seasons File
gsf	Ghostscript Fonts
GSF	Multi Game Memory Editor Date File (Opencoding.net)
GSHR	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSI	GPS Tuner Map Slices Calibration Data (Megalith-Systems)
GSI	GeneSys Remote Administration File (Psytech International)
GSL	GoodSync Job List File (Siber Systems Inc.)
GSLIB	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSM	Raw GSM 6.10 Audio Stream
GSM	US Robotics Modem File GSM Audio over MODEM File
GSM	ArchiCAD Library Object (Graphisoft R&D Software Development Rt.)
GSM	GoldSim Model File (GoldSim Technology Group)
GSMA	Glove Shack Mail Archive (The Glove Shack)
GSN	Cyberboard Scenario (Dale Larson)
GSN	GeneSys Norm File (Psytech International)
GSO	WinOrganizer or GoldenSection Notes Database (The Golden Section Labs)
GSOS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSP	Geometer's Sketchpad Document File (Key Curriculum Press)
GSP	Giza Specifier Project File (20-20 Technologies)
GSP	Grelix Software Packer Archive (Grelix Software)
GSP	IMail Server Returned Mail (Ipswitch, Inc.)
GSP	GoldSim Input Model File (GoldSim Technology Group)
GSPLUS	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSR	GeneSys Report File (Psytech International)
GSR6	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSS	Geometer's Sketchpad Script (Key Curriculum Press)
GSS	Multi Game Memory Editor Memory Snapshot (Opencoding.net)
GST	Multi Game Memory Editor Template File (Opencoding.net)
GST	Giza Specifier Template File (20-20 Technologies)
GST	Need for Speed
GST	MapInfo Geoset File (MapInfo Corporation)
GST	Gain Script Text (AIM Software)
GSTORE	GMailStore Archive
GSV	Genecyst SRAM ROM Dump
GSV	GameShark SP Gameboy Advance Game Save Info (Mad Catz, Inc.)
GSW	GRDSOZ4W Gerdsooz Source File
GSW	GraphShow Worksheet
GSX	Gens 2.0 Save State File
GSX	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GSXL	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GT2	Graoumf Tracker Music Module
GTAG	Jelbert GeoTagger Database File (Jelbert Consulting)
GTAR	GNU tar Compressed File Archive (GNU Tape Archive)
GTD	GT Designer 2 Project (Mitsubishi Electric Corporation)
GTE	GigaTrust RM-protected File (GigaMedia Access Corporation)
GTF	PGA Golf Binary File
GTF	Tom Clancey's Ghost Recon Game File (Red Storm Entertainment)
GTH	Domino Document Manager (IBM)
GTK	Graoumf Tracker Music Module
GTM	GPS TrackMaker General Map File (Geo Studio Technologies Ltd.)
GTO	Quicken On-line File (Intuit Inc.)
GTP	Guitar Pro Tablature (Arobas Music)
GTP	Atari Executable (Atari)
GTP	MultiFS Video File
GTS	Genome Software Tempo Alarm Clock
GTT	Guntram's Tabletweaving Thingy
GTV	GigaTrust RM-protected File (GigaMedia Access Corporation)
GTX	Genetica Texture Pack (Spiral Graphics Inc.)
GTX	GTX Group IV Raster Graphic
GTY	Gibson Tray File
guess	Configuration Identification Script
GUI	GUI Design Studio Project File (Caretta Software Ltd.)
GUI	Doom User Interface Information (Id Software, Inc.)
GUI4CLI	Gui4Cli Graphical User Interface for Command User Interface (Dimitris Keletsekis)
GUIDE	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GUIDE	Amigaguide Hypertext Document (Amiga, Inc.)
GUIKIT	ShapeShifter Theme (Unsanity LLC)
GUITAR	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GUL	Samsung Document (Samsung)
GUL	JungUm Global Viewer Korean Language File (Samsung Electronics)
GUN	Tom Clancey's Ghost Recon Gun Description File (Red Storm Entertainment)
GUN	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GUN2	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GUP	PopMail Data
GUR	Gutsch & Exner Software Update Undo
GUT	ASSISTANT Data File (GUT GmbH)
GUX	Gutsch & Exner Software Update
GV	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GV	Grandview
GV	Graphviz DOT Language File (AT&T Research)
GVI	Google Video File (Google)
GVP	Google Video Playlist (Google)
GVP	gvSIG Project File (Conselleria d'Infraestructures i Transport)
GVS	GuitarVision Song File (MTW Studios, Inc.)
GW3	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GWC	Golfwits Course Map (Siscosoft, Inc.)
GWF	Benthic Golden
GWI	GroupWise Link Information (Novell, Inc.)
GWK	GraphiCode Printed Circuit Board Drawing
GWM	Epson Creative Studio 30 Example File (Epson Corporation)
GWP	Greetings WorkShop File
GWP	GoodWay Flight Planner Flight Plan File (GoodWay)
GWS	Goldwave User's Settings Files (Goldwave Inc.)
GWS	GeoMedia Geoworkspace File
GWV	Groundwater Vistas Packaged Model File (Environmental Simulations International Ltd (ESI))
GWX	Genigraphics Graphics Link Presentation
GWZ	Genigraphics Graphics Link Presentation
GX	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
GX1	Show Partner Graphics File
GX2	Show Partner Graphics File
GXA	General CADD Pro Attributes (General CADD Products, Inc.)
GXC	General CADD Pro Component (General CADD Products, Inc.)
GXD	Jeol EX Spectrometer Data File
GXD	General CADD Pro Drawing File (General CADD Products, Inc.)
GXD	GX-Reports File
GXF	Grid Exchange Format
GXF	SMPTE GXF Container
GXF	General CADD Pro Font (General CADD Products, Inc.)
GXL	Genus Graphics Library
GXM	General CADD Pro Macro Script (General CADD Products, Inc.)
GXP	Jeol EX Spectrometer Data File
GXR	GX-Reports File
GXR	Genexus Report Viewer
GXS	GrafiXML Native Format (Universite Catholique de Louvain-la-Neuve)
GXT	Grand Theft Auto II/III Text (Rockstar Games)
GXW	GRASS GIS Workspace Layout Definition (Open Source Geospatial Foundation)
GYM	Geoworks Generic Symbol File
GYM	Sega Genesis/Mega Drive Music Logged Format (Sega of America, Inc.)
GZ	Gzip Compressed Archive
GZ	GIMP Image File (The GIMP Team)
GZA	GZA Compressed Archive
GZF	Webcopier File
GZIP	GNU Zip Compressed Archive
GZIP	Gzip Compressed Archive
GZL	Go!Zilla File
GZP	Giants: Citizen Kabuto
GZX	Gazette File (Zeno Systems)