| Abbreviation | Definition |
|---|---|
| GLFA | Gay and Lesbian Foundation of Australia |
| GMAA | Graduate Management Association of Australia |
| GMOM | Geelong Museum of Motoring |
| GOA | Government of Australia |
| GOR | Great Ocean Road |
| GPPAC | General Practice Partnership Advisory Council (Australia) |
| GPWA | Gold Prospecting West Australia |
| GSAA | German Studies Association of Australia |
| GSAA | Girevoy Sport Australia Association |
| GWA | Genesee Wyoming Australia |
| GWWA | Graduate Women Western Australia |
| HAA | Hepatitis Australian Antigen |
| HAL | Horticulture Australia Limited |
| HARPS | Harmonised Australian Retailer Produce Scheme |
| HAWA | Hardware Association of Western Australia |
| HCA | High Court of Australia |
| HESTIA | Holds Every Size Tit In Australia |
| HFCA | Happy Football Cambodia Australia |
| HFHA | Habitat for Humanity Australia |
| HFPA | Health Focus Products Australia |