| Abbreviation | Definition |
|---|---|
| GACC | German American Chamber of Commerce |
| GACC | German American Chambers of Commerce |
| GACC | German American Cultural Center |
| GACL | German American Citizens League |
| GACS | German American Cultural Society |
| GADE | German Association for Distance Education |
| GAE | German Antarctic Expedition |
| GAFB | German Armed Forces Badge |
| GAIN | German Academic International Network |
| Gal. | Galerie |
| GAPP | German American Partnership Program |
| Gart.ant. | Gartenanteil |
| GASCO | German Austrian and Swiss Consortia Organization |
| GASG | German AIDS Study Group |
| GASL | German Academy of Sciences Leopoldina |
| GASL | German-American Soccer League |
| GAT | German American Technologies |
| GAVR | Grosstes Anzunehmendes Verrücktes Rüsseltier |
| GAWN | German Alumni Water Network |
| GAWN | German Amateur Wrestling Neumarkt |