| Extension |
File Type |
File Description |
| .g721 | Audio | G.721 Audio File |
| .g723 | Audio | G.723 Audio File |
| .g726 | Audio | G.726 Audio File |
| .gadget | Executable | Windows Gadget |
| .gam | Game | Saved Game 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 |
| .gbc | Game | Game Boy Color ROM |
| .gbx | Misc | Gerber PCB File |
| .gc | Data | GraphClick File |
| .gca | Compressed | GCA File Archive |
| .gcd | Disk | Prassi CD Image |
| .gcf | Game | Game Cache File |
| .gcx | Data | Grapher Graph File |
| .gdb | Data | InterBase Database File |
| .gdr | Font | Symbian OS Font File |
| .gds | Image | Graphic Design System |
| .ged | Data | GEDCOM Genealogy Data File |
| .ged | Developer | Game Editor Project File |
| .gem | Page Layout | Ventura Publisher Document |
| .gem | Vector Image | GEM Metafile |
| .gfb | Raster Image | GIFBlast Image |
| .gg | Misc | Google Desktop Gadget File |
| .gho | Backup | Norton Ghost Backup File |
| .gi | Disk | Global Image |
| .gi | Disk | RecordNow! CD Image |
| .gid | Settings | Windows Help Index File |
| .gif | Raster Image | Graphical Interchange Format File |
| .gig | Audio | Tascam GigaSampler File |
| .gio | Text | Adagio Score |
| .gio | Text | Nyquist MIDI File |
| .gkh | Disk | Ensoniq EPS Family Disk Image |
| .gks | Image | Graphics Kernel System |
| .gl | Video | GRASP Animation |
| .global | Developer | Global Makefile |
| .gly | Misc | Microsoft Word Glossary |
| .gm6 | Developer | Game Maker 6 Project File |
| .gmd | Developer | Game Maker Program Code |
| .gmf | Image | Geology Multi-File |
| .gmk | Developer | Game Maker 7 File |
| .gms | Data | Gesture and Motion Signal File |
| .gne | Web | Flickr Web Page |
| .gnp | Data | GNPeak Output File |
| .gorm | Developer | Gorm Interface Resource File |
| .gp4 | Misc | CCITT Group 4 Fax File |
| .gp4 | Misc | Guitar Pro 4 Tablature |
| .gp5 | Audio | Guitar Pro 5 Tablature File |
| .gpe | Executable | GP2X Video Game |
| .gpg | Misc | GNU Privacy Guard Public Keyring |
| .gpn | Text | GlidePlan Map Document |
| .gpu | Executable | GP2X Utility Program |
| .gpx | Data | GPS Exchange File |
| .gra | Data | Microsoft Graph File |
| .graffle | Image | OmniGraffle Drawing |
| .grasp | Video | GRASP Animation |
| .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 |
| .growlregdict | Misc | Growl Temp File |
| .grp | System | Windows Program Manager Group |
| .grp | Game | StarCraft Graphics Group File |
| .grr | Data | Gradekeeper Class Roster File |
| .gry | Image | Grayscale Image |
| .gs3 | Developer | GameStarter File |
| .gsd | Vector Image | Graphtec Vector Graphics File |
| .gsm | Audio | Global System for Mobile Audio File |
| .gsm | Audio | US Robotics GSM Audio File |
| .gsm | 3D Image | Graphic Description Language File |
| .gst | Data | MapInfo Geoset File |
| .gvi | Video | Google Video File |
| .gvp | Video | Google Video Pointer |
| .gwk | Data | GraphiCode PCB Job File |
| .gxl | Data | Graph Exchange Language File |
| .gz | Compressed | Gnu Zipped File |
| .gzip | Compressed | Gnu Zipped File |
