| GAMC | General Agents and Managers Conference 
| Others |
| GAMC | General Assembly Mission Council
| Others |
| GAMC | General Assistance Medical Care
| Others |
| GAMC | Genetic Algorithm Monte Carlo
| Others |
| GAMC | Georgia Automatic Merchandising Council
| Others |
| GAMC | Georgia Automatic Merchandising Council's
| Others |
| GAMC | Ghana Association of Microfinance Companies
| Others |
| GAMC | Glendale Adventist Medical Center
| Others |
| GAMC | Global Aspiring Medic Conference
| Others |
| GAMC | Global Automotive Management Council
| Others |
| GAMC | Gold Australia Migration Consultants
| Others |
| GAMC | Great American Math Challenge
| Others |
| GAMC | Great American Multiplication Challenge
| Others |
| GAMC | Greater Akron Motorcycle Club
| Others |
| GAMC | Green Advanced Manufacturing Collaborative
| Others |
| GAMC | Greenfield Area Medical Center
| Others |
| GAMC | Grepalife Asset Management Corporation
| Others |
| GAMC | Guangzhou Automobile Group Motor Company
| Others |
| GAMC | Gundagai Antique Motor Club
| Others |