| G File Extensions |
File types with extensions that start with the letter G.
| Extension | File Type | File Summary |
| .g | CAD | BRL-CAD Geometry File |
| .g3x | Game | RealFlight Content File |
| .g721 | Audio | G.721 Audio File |
| .g723 | Audio | G.723 Audio File |
| .g726 | Audio | G.726 Audio File |
| .gadget | Executable | Windows Gadget |
| .galaxy | Game | Blizzard Galaxy File |
| .gallery | Data | SMART Notebook Gallery File |
| .gallerycollection | Data | SMART Notebook Gallery Collection File |
| .galleryitem | Data | SMART Notebook Gallery Item File |
| .gam | Game | Saved Game File |
| .game | Game | Apple Chess Saved Game |
| .gan | Data | GanttProject Project File |
| .gau | Misc | Flight Simulator Gauge File |
| .gb | Game | Game Boy ROM File |
| .gb1 | Backup | Game Maker Backup File |
| .gba | Game | Game Boy Advance ROM |
| .gbap | Manufacturer | Dream Design Entertainment GLBasic Project File |
| .gbas | Manufacturer | Dream Design Entertainment GLBasic Source File |
| .gbc | Game | Game Boy Color ROM |
| .gbi | Disk Image | gBurner Project File |
| .gbp | Backup | Genie Timeline Backup Index File |
| .gbproj | Audio | GarageBand Project |
| .gbr | Data | Gerber File |
| .gbr | Raster Image | GIMP Brush File |
| .gbx | CAD | Gerber PCB File |
| .gbx | Game | Nadeo Game File |
| .gc | Game | Galactic Conquest Saved Game |
| .gc | Data | GraphClick File |
| .gca | Compressed | GCA File Archive |
| .gcd | CAD | Generic CADD Drawing File |
| .gcd | Disk Image | Prassi CD Image |
| .gcf | Game | Game Cache File |
| .gci | Game | GameCube Save File |
| .gcm | Game | Game Cube ROM |
| .gcs | Game | GameCube SharkSave File |
| .gcx | Data | Grapher Graph File |
| .gdb | Database | InterBase Database File |
| .gdr | Font | Symbian OS Font File |
| .gds | CAD | Graphic Data System File |
| .ged | Manufacturer | Game Editor Project File |
| .ged | Data | GEDCOM Genealogy Data File |
| .gedcom | Data | GEDCOM Genealogy File |
| .gem | Vector Image | GEM Metafile |
| .gem | Manufacturer | RubyGems Package |
| .gem | Page Layout | Ventura Publisher Document |
| .gen | Data | ArcView ARC/INFO UnGenerate file |
| .geo | 3D Image | VRML Geography File |
| .gfb | Raster Image | GIFBlast Compressed Image File |
| .gfp | Video | GreenForce-Player Protected Media File |
| .gg | Misc | Google Desktop Gadget File |
| .ggb | Data | GeoGebra Document |
| .gho | Backup | Norton Ghost Backup File |
| .ghs | Backup | Norton Ghost Image Segment |
| .gi | Disk Image | Global Image |
| .gi | Disk Image | RecordNow! CD Image |
| .gid | Settings | Windows Help Global Index File |
| .gif | Raster Image | Graphical Interchange Format File |
| .gig | Audio | Tascam GigaSampler File |
| .gih | Raster Image | GIMP Image Hose File |
| .gim | Raster Image | PlayStation Portable Image File |
| .gin | Settings | GEMS Engine Control Unit File |
| .gio | Text | Adagio Score |
| .gio | Text | Nyquist MIDI File |
| .gis | Data | CFS Console Game Installer Settings File |
| .gkh | Disk Image | Ensoniq EPS Family Disk Image |
| .gks | Vector Image | Graphics Kernel System File |
| .gl | Video | GRASP Animation |
| .glade | Manufacturer | Glade Project File |
| .gld | Data | Ground Loop Design Work File |
| .gld | Manufacturer | MPLAB C Compiler Linker Script File |
| .global | Manufacturer | Global Makefile |
| .gls | Manufacturer | GLScript Game Script |
| .gls | Data | Babylon Glossary File |
| .gly | Misc | Word Glossary File |
| .gm6 | Manufacturer | Game Maker 6 Project File |
| .gmbck | Raster Image | Game Maker Background Image File |
| .gmd | Manufacturer | Game Maker Program Code |
| .gmf | GIS | Geology Multi-File |
| .gmk | Manufacturer | Game Maker 7 File |
| .gml | Manufacturer | Game Maker Language File |
| .gml | GIS | Geography Markup Language File |
| .gmmp | System | WCS Gamut Map Model Profile |
| .gmo | Manufacturer | GNU Machine Object File |
| .gmres | Game | Game Maker Resource File |
| .gms | Data | Gesture and Motion Signal File |
| .gmv | Game | Gens Game Recording |
| .gne | Web | Flickr Web Page |
| .gno | Data | GenoPro Genealogy Tree File |
| .gnp | Data | GNPeak Output File |
| .gnutar | Data | GNU Tar Archive |
| .gorm | Manufacturer | Gorm Interface Resource File |
| .gp3 | Data | Guitar Pro 3 File |
| .gp4 | Misc | Guitar Pro 4 Tablature |
| .gp4 | Raster Image | CCITT Group 4 Fax File |
| .gp5 | Audio | Guitar Pro 5 Tablature File |
| .gpbank | Audio | Guitar Pro Sound Bank File |
| .gpd | Raster Image | Graphic PhotoDefiner Image File |
| .gpe | Executable | GP2X Video Game |
| .gpf | Game | GRAVITY Ragnarok Online Patch File |
| .gpf | Game | Gecko Patch File |
| .gpf | GIS | Geosoft Project File |
| .gpf | Data | Grant Agreement Preparation Form |
| .gpg | Misc | GNU Privacy Guard Public Keyring |
| .gpi | Data | Garmin Point of Interest File |
| .gpk | Audio | WaveLab Audio Peak File |
| .gpn | Text | GlidePlan Map Document |
| .gpr | Data | Babylon Glossary Builder Project File |
| .gps | GIS | Survey Pro Coordinate File |
| .gps | Settings | GenePix Settings File |
| .gps | Settings | GOM Player Skin File |
| .gpu | Executable | GP2X Utility Program |
| .gpx | Audio | Guitar Pro 6 Document |
| .gpx | GIS | GPS Exchange File |
| .gr2 | Game | Granny 3D File |
| .gra | Data | Microsoft Graph File |
| .grade | Data | GradeStat Document |
| .graffle | Vector Image | OmniGraffle Drawing |
| .grasp | Video | GRASP Animation |
| .grd | Settings | Photoshop Gradient File |
| .grf | Data | Generic Graph File |
| .grf | Data | DPlot Graph File |
| .grf | Game | Ragnarok Client Archive |
| .grib | Data | Gridded Binary File |
| .grk | Data | Gradekeeper Class Gradebook File |
| .grl | System | Windows Update Status File |
| .grn | 3D Image | Granny 3D File |
| .gro | Raster Image | Graphic Object Bitmap |
| .grob | Raster Image | Graphic Object Bitmap File |
| .groove | Audio | ACID Groove File |
| .group | System | Windows Contacts Group File |
| .growlregdict | Misc | Growl Temp File |
| .growlticket | Settings | Growl Notification File |
| .grp | Data | SmarterMail Group File |
| .grp | Game | StarCraft Graphics Group File |
| .grp | System | Windows Program Manager Group |
| .grr | Data | Gradekeeper Class Roster File |
| .grv | Data | Office Groove File |
| .gry | Raster Image | Grayscale Image |
| .gs | Data | GemStone Document |
| .gs | Executable | Geosoft Script |
| .gs3 | Manufacturer | GameStarter File |
| .gsd | Vector Image | Graphtec Vector Graphics File |
| .gsd | Text | General Station Description File |
| .gsm | Audio | Global System for Mobile Audio File |
| .gsm | Audio | US Robotics GSM Audio File |
| .gsm | CAD | Graphic Description Language File |
| .gsp | Misc | Geometer’s Sketchpad File |
| .gsp | Web | IMail Error Message File |
| .gst | GIS | MapInfo Geoset File |
| .gtar | Data | GNU Tar Archive |
| .gthr | Text | Gather Log File |
| .gtp | Data | Guitar Pro File |
| .gtp | Settings | GNOME Theme Package File |
| .gts | Video | CaptiveWorks PVR Video File |
| .gv | Text | GraphcViz DOT File |
| .gvi | Video | Google Video File |
| .gvp | Video | Google Video Pointer |
| .gwi | Database | GroupWise Database Shortcut File |
| .gwk | Data | GraphiCode PCB Job File |
| .gwp | Data | Greetings Workshop Project File |
| .gws | Settings | GeoMedia GeoWorkspace File |
| .gws | GIS | Geosoft Workspace File |
| .gxc | CAD | General CADD Pro Component |
| .gxd | CAD | General CADD Pro Drawing |
| .gxl | Data | Graph Exchange Language File |
| .gxt | Settings | Grand Theft Auto Text File |
| .gz | Compressed | Gnu Zipped Archive |
| .gzi | Compressed | Unix Gzip File |
| .gzip | Compressed | Gnu Zipped File |