| GRT | Gross Registered Tonnage | 总登记吨，简称总吨 |
| GRT | Gujrat, Pakistan | 巴基斯坦古吉拉特 |
| GRT | Grit Recycling Trailer | 砂砾回收拖车 |
| GRT | Germanium Resistance Thermometer | 锗电阻温度计 |
| GRT | Gear For Rugged Training | 坚固训练装备 |
| GRT | Governor Response Tester | 调速器响应测试仪 |
| GRT | Ground Receive Terminal | 地面接收终端 |
| GRT | Gross Register Tonnage | 总注册吨位 |
| GRT | Gross Registered Tons | 总注册吨数 |
| GRT | Groston | 格罗斯顿 |
| GRT | Gardenfors Ramsey Test | Gardenfors Ramsey测试 |
| GRT | Gumbo Racing Team | Gumbo赛车队 |
| GRT | Ground Radio Transmitter | 地面无线电发射机 |
| GRT | Grand Rapids Technologies (avionic instrument company) | Grand Rapids Technologies（航空电子仪器公司） |
| GRT | Ground Readiness Test | 地面准备测试 |
| GRT | Glimcher Realty Trust | Glimcher房地产信托 |
| GRT | General Radiologic Technologist | 普通放射技师 |
| GRT | Group Rapid Transit | 集团快速运输 |
| GRT | Grand River Transit (Waterloo, Canada) | Grand River Transit（加拿大滑铁卢） |
| GRT | Gruppo per le Relazioni Transculturali | 跨文化研究小组 |
| GRT | Generic Real Time | 通用实时 |
| GRT | General Relativity Theory | 广义相对论 |
| GRT | General Range Types (forestry) | 一般范围类型（林业） |
| GRT | Gross Requirement Tape | 总需求胶带 |
| GRT | Granular Restore Technology (Symantec Inc.) | 精细恢复技术（Symantec Inc.） |
| GRT | Gold Rush Trail | 淘金路 |
| GRT | Gestionnaires de RÉseau de Transport (French) | Gestionnaires de RÉseau de Transport (French) |
| GRT | Gross Registered Tonnage/Tons | 总注册吨位/吨 |
| GRT | Government Rate Tender | 政府价格招标 |
| GRT | General Reactor Technology | 通用反应堆技术 |