| gfie | Greenfish Icon Editor Pro Graphic |
| gfm | Ashton-Tate Applause CGM Picture |
| gfx | Amstrad CPC Mode 5 Image |
| gg | Koala Paint Compressed Bitmap |
| ggr | Gimp Gradient File |
| ghg | Gephard Hires Graphics Bitmap Image |
| gif | CompuServe Bitmap Image |
| giff | CompuServe Bitmap Image |
| gig | C64 GigaPaint Image |
| gih | Gimp Animated Brush |
| gim | PlayStation Portable Image File |
| gks | MODPATH GKS Data |
| gl2 | HP Graphic Language Document |
| gl8 | MSX2 GL8 Bitmap |
| glox | Microsoft Office SmartArt Graphics Layout |
| gm | Autologic Bitmap Image |
| gm2 | Autologic Bitmap Image |
| gm4 | Autologic Bitmap Image |
| gmf | Gamma Fax Image |
| gn | Apollo HDRU Image |
| god | Atari Falcon GodPaint Image |
| goe | GOES Satellite Bitmap Image |
| goes | McIDAS Satellite Image Data |
| gp4 | CALS Compressed Bitmap |
| gr1 | Atari 8-bit Mad Studio Image |
| gr2 | Atari 8-bit Mad Studio Image |
| gr3 | Atari 8-bit Mad Studio Image |
| gr7 | Atari 8-bit Graphics 7 Image |
| gr8 | Atari 8-bit Graphics 8 Image |
| gr9 | Atari 8-bit Graphics 9 Image |
| gr9p | Atari 8-bit Graphics 9+ Image |
| grb | HP-48 Graphic Object |
| grd | Adobe Photoshop Gradient File |
| grl | MATLAB Image |
| gro | HP-48 Graphic Object |