| Acronym | Meaning |
| TGS | Target Ground Speed (US Air Force) |
| TGS | Tax on the Circulation of Goods and Services (customs duty) |
| TGS | Telemetry Ground Station |
| TGS | Track Generation System |
| TGS | Traffic Guidance Scheme (Australia) |
| TGS | Trusted Gateway System (provides secure one-way transfer of data between enclaves) |
| TGS | Turkish General Staff (Turkey) |
| TGS | Turreted Gun System |