| Acronym | Definition |
|---|
| GMHA | Guam Memorial Hospital Authority |
| GMHA | Green Mountain Horse Association |
| GMHA | Georgia Manufactured Housing Association |
| GMHA | Greene Metropolitan Housing Authority |
| GMHA | Georgetown Minor Hockey Association (Ontario, Canada) |
| GMHA | Geauga Metropolitan Housing Authority (Ohio) |
| GMHA | Guelph Minor Hockey Association (Canada) |
| GMHA | Geriatric Mental Health Alliance |
| GMHA | Georgina Minor Hockey Association (Ontario, Canada) |
| GMHA | Greater Milford Health Alliance |
| GMHA | Grand Master Hiram Abif |
| GMHA | Grand Manan Harbour Authority |
| GMHA | Greenwood Minor Hockey Association (Canada) |