| Acronym | Definition |
|---|
| TGSL | Texas Guaranteed Student Loan |
| TGSL | Torrance Girls Softball League (California) |
| TGSL | Turfloop Graduate School of Leadership (South Africa) |
| TGSL | Transactor Global Solutions Limited (UK) |
| TGSL | Tibeter Gemeinschaft in der Schweiz und Liechtenstein (German: Tibetan Community in Switzerland and Liechtenstein) |
| TGSL | Thinksoft Global Services Limited (India) |
| TGSL | Talleyville Girls Softball League (Delaware) |
| TGSL | Taunton Girls Softball League (Massachusetts) |
| TGSL | Taylor Girls Softball League (Kokomo, IN) |
| TGSL | Turnpike Girls Softball League (Pennsylvania) |
| TGSL | Technischer Gebäudeservice Leipzig (German: Technical Building Service Leipzig; Leipzig, Germany) |
| TGSL | Together for Globally Safe Labor (interest group) |
| TGSL | Tewksbury Girls Softball League (Massachusetts) |