GBMA
| Acronym | Definition |
|---|---|
| GBMA | Gypsum Board Manufacturers of Autralasia (Australia and New Zealand) |
| GBMA | Greater Blue Mountains Area (Australia) |
| GBMA | Gettysburg Battlefield Memorial Association (est. 1864; Gettysburg, PA) |
| GBMA | Grizzly Bear Management Area (various locations) |
| GBMA | Greater Boston Metropolitan Area (Massachusetts) |
| GBMA | Gaussian Beam Mode Analysis |