List of Data File Formats Starting with the Letter "G"
| .g | Data chart (APPLAUSE) |
| .g3 | Group 3 Fax document; Group 3 Fax |
| .g3f | Zetafax TIFF file (fine resolution) |
| .g3n | Zetafax TIFF file (normal resolution) |
| .g8 | Raw graphics (one byte per pixel) plane three (PicLab) |
| .gab | Global Address Book file |
| .gal | Corel Multimedia Manager Album |
| .gam | Saved Game file |
| Fax (GammaFax) | |
| TADS 2.x Game file | |
| Baldur's Gate Game file | |
| Animated E-mail | |
| .gat | Gator file |
| .gb | Pagefox Bitmap Image file |
| GameBoy ROM | |
| .gba | Game Boy Advanced ROM |
| GrabIt Batch files | |
| .gbc | Game Boy COlor ROM |
| .gbd | Gator Banner file |
| .gbl | Global definitions (VAXTPU editor) |
| .gbr | GIMP Brush file |
| Gerber Format file | |
| .gbx | Gerber file |
| .gc1 | Lisp source code (Golden Common Lisp 1.1) |
| .gc3 | Lisp source code (Golden Common Lisp 3.1) |
| .gcd | Graphics |
| .gcf | Steam GCF File |
| .gdb | Interbase Database |
| Group Mail file | |
| .gdf | Dictionary file (GEOS) |
| .gdr | Bitmap Font file (SymbianOS) |
| .ged | Editor's native file format (Arts & Letters) |
| GEDCOM Family History file | |
| Graphic Environment Document | |
| Graphics editor file (EnerGraphics) | |
| Game Editor Project File | |
| .gem | Vector graphics (GEM - Ventura Publisher) |
| .gen | Compiled template (dBASE Application Generator) |
| Generated text (Ventura Publisher) | |
| Genius Family Tree | |
| .geo | Geode (Geoworks) |
| .gfb | Compressed GIF image created by GIFBLAST (gifblast.exe) |
| .gft | Font (NeoPaint) |
| .gfx | Genigraphics Graphics Link Presentation |
| Graphic format used by Allen Bradley SCADA Software (RSView Works) | |
| .gg | Google Desktop Gadget file |
| .gho | Symantec Ghost Disk image file |
| .ghs | Lasertank High Scores |
| Symantec Ghost Disk Image Span file | |
| .gib | Chart (Graph-in-the-Box) |
| .gid | Windows Help index file |
| .gif | Graphics Interchange Format bitmap graphics (CompuShow) |
| .gig | Sound file |
| .giw | Presentation (Graph-in-the-Box for Windows) |
| .gl | Animation (GRASP GRAphical System for Presentation) |
| .glm | Datafile (Glim) |
| .gls | Datafile (Across) |
| .gly | Glossary (MS Word) |
| .gmd | Game Maker file format |
| .gmf | CGM graphics (APPLAUSE) |
| .gml | Geography Markup Language file |
| .gmp | Geomorph tile map (SPX) |
| .gno | Genopro Genealogy Document file |
| .gnt | In MF COBOL a compiled .cbl file |
| .goc | Goc source code file (Geoworks) |
| .goh | Goc header file (Geoworks) |
| .gp | Geode parameter file (Geoworks Glue) |
| .gp3 | CCITT Group 3 file |
| GuitarPro 3 | |
| .gp4 | Guitar Pro version 4.06 |
| .gpd | VISUAL EPR Input Data for PARAMS.EXE |
| .gph | Graph (Lotus 1-2-3/G) |
| .gpk | Omnigo program package |
| .gpx | GPS eXchange Format |
| .gr2 | Screen driver (Windows 3.x) |
| .gra | Datafile (SigmaPlot) |
| .grb | Ms-DOS Shell Monitor file (MS-DOS 5) |
| .grd | Gradebook Power file |
| Map Projection Grid file | |
| .grf | Micrografix Image file |
| Graph file (Graph Plus - Charisma) | |
| .grl | Matlab Graphic Format |
| .grp | Group file (Windows 3.x - Papyrus) |
| Pictures group (PixBase) | |
| .grx | File list (GetRight) |
| .gry | Raw GREY graphics |
| .gs1 | Presentation (GraphShow) |
| .gsd | Vector graphics (Professional Draw) |
| GSplit file splitting utility (GDGsoft.com) | |
| .gsm | Raw GSM 6.10 Audio Stream |
| Sound file | |
| US Robotics modem file | |
| .gsp | Geometer's Sketchpad Material file |
| .gsw | Worksheet (GraphShow) |
| .gtp | Gnome Desktop Theme file |
| GuitarPro file | |
| .gts | Genome Software Tempo Alarm Clock |
| .gup | Data (PopMail) |
| .gwi | Groupwise File |
| .gwp | Greetings WorkShop file |
| .gxd | General CADD Pro file |
| GX-Reports file | |
| Jeol EX Spectrometer Data file | |
| .gxl | Graphics library (Genus) |
| .gxt | GTA2 Game file |
| .gym | Sega Genesis Music Logged Format |
| .gz | Compressed file archive created by GZIP (GNU zip) |
| .gzip | Compressed file archive created by GZIP (GNU zip) |
