| Abbreviation | Definition |
|---|---|
| GMLPC | Greater Manchester Local Pharmaceutical Committee |
| GMMA | Gloucester Master Mariners' Association |
| GMNA | Guild of Miniature Needle Arts |
| GMOA | Georgia Motorcoach Operators Association |
| GMOA | Government Medical Officers' Association (Sri Lanka) |
| GMTA | Georgia Music Teachers Association |
| GMTA | Gloucester Music Teachers Association |
| GNAR | Greater Nashville Association of REALTORS |
| GOALS | Game Of Online Association League Soccer |
| GOB | Guild Of Bricksmiths |
| GOC | General Optical Council |
| GODA | Guild Of Drama Adjudicators |
| GODI | Global Open Data Initiative |
| GOFO | Greenville Organic Foods Organization |
| GOTA | Georgia Occupational Therapy Association |
| GOVNA | Greater Oakland Visiting Nurse Association |
| GPA | Gas Processors Association |
| GPA | Grant Professionals Association |
| GPA | Great Potatoe Association |
| GPPA | General Practice Psychotherapy Association |