GTL may refer to :
- Gas to liquids, a refinery process
- Georgia Tech Lorraine, a campus of the Georgia Institute of Technology in Metz, France
- Global Training & Logistics, a business unit of Lockheed Martin Corporation
- Group term life insurance, a type of life insurance that holds no cash value
- GTL, a model of tram operated by HTM Personenvervoer
- GT Legends, a PC racing game
- Gunning transceiver logic, a type of electronic logic signaling
- "Gym, Tan, Laundry", an expression made popular by the TV series Jersey Shore