GCL may refer to:
Computing GNU Common Lisp Guarded Command Language, used for predicate transformer semantics Graphical Command Language of Geomview
Honours Grand Companion of the Order of Logohu, an honour of Papua New Guinea Grand Cross of the Order of Liberty, an honour of Portugal
Science Ganglion cell layer Geosynthetic clay liner Glutamate–cysteine ligase Global coordination level
Sports Golf Club of Lebanon Greater Catholic League, an Ohio high school athletic conference Gulf Coast League, a rookie-level Minor League Baseball league
Transport Glassboro–Camden Line, a proposed light rail line between Camden and Glassboro in New Jersey Gul Circle MRT station, a Mass Rapid Transit station in Tuas, Singapore (MRT station abbreviation) Gulf Coast Lines, a defunct American railway company
Other uses GCL-Poly, Golden Concord Group Limited, a green energy company Government Category List, in the United Kingdom Grenadian Creole English, ISO 639-3 code gcl Griffith College Limerick, in Ireland