| GTMA | Garment and Textile Manufacturers Association (Malawi) 
| Others |
| GTMA | Gas Turbine Materials Associates
| Others |
| GTMA | Gas Turbine Materials Associates, Inc.
| Others |
| GTMA | Gauge and Toolmakers Association (UK)
| Others |
| GTMA | Gauteng Transport Management Authority
| Others |
| GTMA | Georgia Textile Manufacturers Association
| Others |
| GTMA | Georgia Transfer to Minors Act
| Others |
| GTMA | Geospatial Transportation Mapping Association
| Others |
| GTMA | German Trademark Act
| Others |
| GTMA | Getting The Message Across
| Others |
| GTMA | Glendale Transportation Management Association (California)
| Others |
| GTMA | Go To My Apartment
| Others |
| GTMA | Greater Toronto Marketing Alliance
| Others |
| GTMA | Green Throated Mango A (a. Viridula)
| Others |
| GTMA | Grid Trade Master Agreement
| Others |