| GMBA | General Missionary Benevolent Association 
| Others |
| GMBA | Georgina Minor Baseball Association
| Others |
| GMBA | Global Marine Business Advisors
| Others |
| GMBA | Global Master of Business Administration
| Others |
| GMBA | Global Masters of Business Administration
| Others |
| GMBA | Global Mountain Biodiversity Assessment
| Others |
| GMBA | Government Management and Budgetary Accounting
| Others |
| GMBA | Greater Merrifield Business Association
| Others |
| GMBA | Greater Milwaukee Bowling Association
| Others |
| GMBA | Greater Milwaukee Bridge Association
| Others |
| GMBA | Greater Mobile Bowling Association
| Others |
| GMBA | Greater Montego Bay Area
| Others |
| GMBA | Green Master of Business Administration
| Others |
| GMBA | Green Mountain Baptist Association
| Others |
| GMBA | Green Mountain Book Award
| Others |
| GMBA | Grenada Mas Band Association
| Others |
| GMBA | Guelph Minor Baseball Association
| Others |