| GÜNther | | GUYN-ter | German, Germanic Mythology | |
| Gabija | | - | Lithuanian, Baltic Mythology | |
| Gaea | | - | Greek Mythology (Latinized) | |
| Gaia | | GAY-ə (English), GIE-ə (English), GAH-yah (Italian) | Greek Mythology, Italian | |
| Gandalf | | GAN-dahlf (English) | Norse Mythology, Literature | |
| Ganymede | | - | Greek Mythology (Anglicized) | |
| Ganymedes | | - | Greek Mythology | |
| Gemini | | JEM-i-nie (English) | Roman Mythology | |
| Geraint | | GE-rient (Welsh), ji-RAYNT (English) | Welsh, Welsh Mythology, Arthurian Romance | |
| Gerd (2) | | YERD (Swedish), GERD (English) | Swedish, Norwegian, Danish, Norse Mythology | |
| Gilgamesh | | GIL-gə-mesh (English) | Near Eastern Mythology | |
| Glaucus | | - | Greek Mythology (Latinized) | |
| Glaukos | | - | Greek Mythology | |
| Glooscap | | - | New World Mythology | |
| Goibniu | | - | Irish Mythology | |