| Abbreviation | Definition |
|---|---|
| GEM | Germanic (Other) |
| GEO | Georgian |
| GER | German |
| GEW | GERA: A Language of Nigeria |
| GEZ | Geez |
| GGE | GURAGONE: A Language of Australia |
| GIL | Gilbertese |
| GLE | Irish |
| GLG | Gallegan |
| GLW | GLAVDA: A Language of Nigeria |
| GMH | German, Middle High (ca. 1050-1500) |
| GND | Zulgo-Gemzek: A language of Cameroon |
| GOH | German, Old High (ca. 750-1050) |
| GON | Gondi |
| GOT | Gothic |
| GRB | Grebo |
| GRC | Greek, Ancient (to 1453) |
| GRE | Greek, Modern (1453-) |
| GRK | Greek |
| GRN | Guarani |