GSL
GSL is an abbreviation for:
- Geological Society of London, a UK-based learned society whose aim is "to explore mineral structure of the earth" which is the oldest geological society in the world
- GOMTV Global Starcraft II League
- GNU Scientific Library, a program library that provides C and C programmers with a variety of functions for numerical calculations available
- Green energy label
GSL as distinguishing signs on license plate:
- Poland: powiat Słupski in the Pomeranian Voivodeship
- Disambiguation
- Abbreviation