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

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