GL, Gl, or gl may refer to:
Businesses and brands
- Air Greenland, IATA airline designator
- Germanischer Lloyd|, a classification society
Government and military
- GreenLeft, a Dutch political party
- Gwardia Ludowa, a Polish resistance group during World War II
Language
- Galician language (ISO 639 alpha-2 language code)
- Palatal lateral approximant, a digraph in Italian
Media
- Girls' love, an anime and manga jargon term for lesbian fiction
- Guiding Light, an American soap opera
People
- G. L. Peiris, Sri Lankan politician and academic
Places
- GL postcode area, UK
- Rheinisch-Bergischer Kreis|, vehicle area code
- Canton of Glarus, Switzerland, ISO 3166-2 subdivision code "GL"
- Greenland (ISO 3166-1 alpha-2 and FIPS PUB 10-4 territory code)
Science and technology
- GL, a symbol for provability logic
- .gl, the country-code top-level domain (ccTLD) for Greenland
- <math>\operatorname{GL}(n)</math>, the general linear group of degree n
- <math>\mathfrak{gl}_n(F)</math>, the general linear Lie algebra
- Gigalitre (or gigaliter), a metric unit of volume
- Glycemic load, an estimate of how much food will raise a person's blood glucose level
- Graphics library, a program library designed to aid in rendering computer graphics to a monitor
- Gl, the element symbol for Glucinium, a historic name of beryllium
Vehicles
- Mercedes-Benz GL-Class, a German full-size SUV
Other uses
- Leather Union, a former German trade union