| Guillem Espias | Developer | |
| Guillem Llovera Castillo | Developer | |
| Guillem Serra | Developer | |
| GuilloTeam | Developer | |
| Guin Entertainment | Developer | |
| Guineu | Developer | |
| GuitarBro | Developer | |
| Guix | Developer | |
| Guld | Developer | |
| GuldorGames | Developer | |
| Gulti | Developer | |
| Gumboi | Developer | |
| Gumboot | Developer | |
| Gumby Bitworks (Ray Giarratana) | Developer | |
| Gumichan01 | Developer | |
| Gumions | Developer | |
| Gumitsu | Developer | |
| Gummy Cat | Developer | |
| GummyJon | Developer | |
| GumshoeJump | Developer | |
| Gun Asylem | Developer | |
| Gun Media | DeveloperPublisher | |
| GunDrill | Developer | |
| GunTurtle | Developer | |
| Gun_Goose | Developer | |
| Gundeck | DeveloperPublisher | |
| Gundogan | Developer | |
| Gunfighters | Developer | |
| Gunfire Games | Developer | |
| Gung-Ho! | Developer | |
| GungHo | DeveloperPublisher | |
| GungHo Online Entertainment | DeveloperPublisher | |
| GungHo Works | DeveloperPublisher | |
| Gunnar Clovis | Developer | |
| Gunnar Games | Developer | |
| Guntler | Developer | |
| Gunzil | Developer | |
| Gurin | Developer | |
| Gurkis | Developer | |
| Gurpegui | Developer | |
| Gurpreet Singh Matharoo | Developer | |
| Guru Games | Developer | |
| GuruGuru | Developer | |
| Guruhebat | Developer | |
| Gus | Developer | |
| Gus Larsen | Developer | |
| GusFuss | Developer | |
| Gushi | Developer | |
| Gussy | Developer | |
| Gust | DeveloperPublisher | |