GMCA
| Acronym | Definition |
|---|---|
| GMCA | Great March for Climate Action (est. 2013) |
| GMCA | Greater Manchester Combined Authority (Manchester, England, UK) |
| GMCA | Galt Mile Community Association (Fort Lauderdale, FL) |
| GMCA | Global Marketing Communication & Advertising (academic program) |
| GMCA | Georgia Mosquito Control Association (Statesboro, GA) |
| GMCA | Global Marine Climatic Atlas |
| GMCA | Georgia Municipal Cemetery Association |
| GMCA | Gore Microwave Cable Assembly |