| Abbreviation | Definition |
|---|---|
| GAIP | Goodman Australia Industrial Partnership |
| GAMC | Gold Australia Migration Consultants |
| GAOG | German Australian Opera Grant |
| GARA | Greek Australian Research Archives |
| GARA | Greenhouse Action in Regional Australia |
| GBCA | Global Business College of Australia |
| GBCA | Green Building Council of Australia |
| GC | Gold Coast |
| GCNA | Global Compact Network Australia |
| GDA | Geocentric Datum of Australia |
| GDAA | Game Developers' Association of Australia |
| GECA | Good Environment Choice Australia |
| GECA | Good Environmental Choice Australia |
| GFA | Gliding Federation of Australia |
| GFAA | Game Fishing Association Australia |
| GFAA | Game Fishing Association of Australia |
| GGTJV | Goldfields Gas Transmission Joint Venture (Perth, Australia) |
| GHTA | Global Heat Transfer Australia |
| GICB | Government Information and Communications Branch |
| GISA | Geographic Indication South Australia |