| GMAS | Games Manga and Anime Society
| Others |
| GMAS | General Musical Analysis System
| Others |
| GMAS | Georges Marine
| Others |
| GMAS | Georges Marine And Sport
| Others |
| GMAS | Georgia Milestone Assessment System
| Others |
| GMAS | Georgia Milestones Assessment System
| Others |
| GMAS | Georgiana Molloy Anglican School
| Others |
| GMAS | Give Me A Sec
| Others |
| GMAS | Give Me A Shout
| Others |
| GMAS | Global Market Access Solutions
| Others |
| GMAS | Global Marketing Advantage System
| Others |
| GMAS | Global Military Aircraft Systems
| Others |
| GMAS | Global Mobility Advisory Services
| Others |
| GMAS | Grandmas
| Others |
| GMAS | Grants Management Application Suite
| Others |
| GMAS | Greater Milwaukee Auto Show
| Others |
| GMAS | Greater Mohican Audubon Society
| Others |
| GMAS | Greenock Medical Aid Society
| Others |
| GMAS | Grid Medical Archive Solution
| Others |