| ggpk | Path of Exile Game Data |
| ghb | Lego Racers Data File |
| gic | Bioware Aurora Game Instance Comments |
| git | Bioware Waypoint Instance Struct |
| gjd | The 7th Guest Media File |
| gla2 | Modern Combat 5 Game Data |
| glb | Ultimate Stunts Binary 3D Model |
| gli | Airline Tycoon Game Data |
| glj | Airline Tycoon Game Data |
| glt | Ultimate Stunts Text 3D Model |
| glu | Hardball Game Data |
| gm1 | Stronghold Crusader GM1 Image |
| gm1 | Heroes of Might and Magic III Saved Game |
| gm2 | Heroes of Might and Magic III Saved Game |
| gm3 | Heroes of Might and Magic III Saved Game |
| gm4 | Heroes of Might and Magic III Saved Game |
| gm5 | Heroes of Might and Magic III Saved Game |
| gma | GMod Addon |
| gmt | rFactor Model |
| gmv | Cyberboard Move File |
| gob | Dark Forces Game Archive |
| god | Populous II Saved Game |
| gog | GOG.com Archive |
| goo | Jedi Knight: Mysteries of The Sith Game Data |
| goomod | World of Goo Add-on |
| gor | Myth: The Fallen Lords Game Data |
| gpac | Sim Brothel Game Data |
| gpf | Ragnarok Online Game Patch |
| gpm | Crossword Puzzle |
| grf | Ragnarok Online Game Data |
| grh | Little Fighter Game Data |
| grle | Farming Simulator Game Data |
| grv | The 7th Guest Data |
| gsc | Call of Duty Script |
| gsl | Animal Quest Game Data |