| GMAS | Global Marketing Advantage System | 全球营销优势系统 |
| GMAS | Global Military Aircraft Systems | 全球军用飞机系统 |
| GMAS | Gas Measurement Accounting System (natural gas pipeline operations auditing software) | 天然气计量会计系统（天然气管道运行审计软件） |
| GMAS | Give Me A Second | 给我一秒钟 |
| GMAS | Ground Mobile ADP System | 地面移动ADP系统 |
| GMAS | Ground Munitions Analysis Study | 地面弹药分析研究 |
| GMAS | Greater Manchester Ambulance Service | 大曼彻斯特救护车服务 |