| gfx | FactoryTalk View Display Data |
| gg | Google Desktop Gadget |
| gg1 | Gerber Drill Guide Data |
| gg2 | Gerber Drill Guide Data |
| gg3 | Gerber Drill Guide Data |
| ggc | Google Desktop Gadget Container |
| ggd | GASTAR Gridded Concentration Data |
| ggn | ABB HTS500 Saved Job |
| ggp | Global Geodynamics Project Data File |
| ggs | NO$GBA Gameboy Emulator Data |
| gh5 | Mplus GH5 Data |
| ghash | Gizmo Central Hash Data |
| ghf | SE309 Binary Data |
| ghlayout | Grasshopper 3D Layout Data |
| ght | StarNet Geoid Model File |
| ghuser | Grasshopper 3D User Data |
| gid | FRAMES Global Input Data File |
| gif2 | NetObjects Fusion Styles Lines Data |
| gift | Moodle GIFT Format Data |
| gii | GIfTI Data |
| gim | Genigraphics Graphics Link Presentation |
| gin | Affymetrix Gene Information Library |
| ginspect | GOM Inspect Data |
| gir | Gens Plus! Movie Capture |
| gix | Genigraphics Graphics Link Presentation |
| gjf | Gaussian Input Data |
| gkf | GAUSS Engine MTGRTE License |
| gko | Gerber Keep Out Layer |
| gkp | GameKeyboard Data |
| gkr | GCJ Key Storage |
| glad | GenePattern GLAD File |
| glb | Binary glTF Data |
| glf | GameExchange2 Light Data |
| glg | MicroSim PCBoard Photoplot Job |
| glh | Gallery Lock Pro Locked Video |