| Acronym | Definition |
|---|
| GTL | Gym, Tanning, Laundry |
| GTL | Genomes to Life (US Department of Energy Office of Science) |
| GTL | GLOCK Tactical Light (Smyrna, GA) |
| GTL | Gas to Liquids |
| GTL | Grand Tourisme Legere |
| GTL | Grand Tourisme Luxe |
| GTL | Gunning Transceiver Logic |
| GTL | Georgia Tech Lorraine (Georgia Institute of Technology; Metz, France) |
| GTL | Gunning Transceiver Logic (specialized local bus) |
| GTL | Group Term Life (payroll taxable benefit) |
| GTL | Genetic Testing Laboratories (various locations) |
| GTL | Going through Life |
| GTL | Gas-To-Liquid technology (natural gas, synthesis gas) |
| GTL | Gem Trade Laboratory (Gemological Institute of America) |
| GTL | Green Tea Lemonade (drink) |
| GTL | Germanium, Tin and Lead (conference series) |
| GTL | Gilway Technical Lamp |
| GTL | Genetic Technologies Limited (Australia) |
| GTL | Government Task Leader |
| GTL | Global Tele-Systems Ltd (India) |
| GTL | Gunning Transistor Logic (JEDEC standard JESD8-3) |
| GTL | Gun-Target Line |
| GTL | Ground Team Leader |
| GTL | Generalized Transmission Line (equations) |
| GTL | Glass Training Ltd (UK industry training body) |
| GTL | Gone to Lunch |
| GTL | Game Theory and the Law |
| GTL | Geomagnetic Tail Laboratory |
| GTL | Greetings Telex Letter |
| GTL | Gaseous Tritium Light |
| GTL | Gross Trailing Load |
