24 File Extensions starting with G
| .G3 | Fax Group 3 Image |
| .G3N | Imaging Fax Image |
| .G4 | Access Image |
| .GAF | Total Annihilation Image |
| .GAN | GanttProject File |
| .GB | Printfox/Pagefox Image |
| .GBR | Gimp Brush Image |
| .GCD | GCD Disk Image |
| .GCM | GameCube Image File |
| .GEM | Digital Research (GEM Paint) Image |
| .GEO | GeoPaint Image |
| .GG | Koala Paint (Compressed) Image |
| .GI | Global Disk Image |
| .GIF | Graphics Interchange Format Image |
| .GIFF | CompuServe GIF Image |
| .GM | Autologic Image |
| .GM2 | Autologic Image |
| .GM4 | Autologic Image |
| .GRB | HP-48/49 GROB Image |
| .GREY | Raw Image |
| .GRO | HP-48/49 GROB Image |
| .GRY | Raw Image |
| .GXF | General eXchange Format |
| .GZ | GNU Zip Compressed Archive |