GCR

• Galactic cosmic ray, a cosmic ray from outside the Solar System
• Geocentric Celestial Reference System, a coordinate system for near-Earth objects like satellites
• Geological Conservation Review, a procedure of the British Joint Nature Conservation Committee
• Global catastrophic risk, a potential catastrophe that would affect the whole world
• Global Competitiveness Report, a yearly report published by the World Economic Forum
• Glucocorticoid receptor, a cell protein which responds to glucocorticoid compounds

• Gas-cooled reactor, a type of nuclear reactor
• Ghost-canceling reference, a television subsignal
• Grey component replacement, substitution of black ink for gray ink in color printing
• Group coded recording, a technique for encoding digital data on magnetic tape or disk

• GCR, ICAO code for Tianjin Airlines, China
• GCR, stock symbol for Gaylord Container Corporation, an American packing material manufacturer
• Great Central Railway, a British railway company
• Great Central Railway (heritage railway)
• Great Central Railway (Nottingham)

• Glass City Rollers, an American roller derby league
• Graduate Common Room, a Common Room (university) for postgraduate students
• Global Corruption Report by Transparency International
• Gray City Rebels, a Brazilian roller derby league
• Green Corn Revival, an American band
• gcr, ISO 639-3 code for the French Guianese Creole language
• {{lang|fr|Groupe Communiste Révolutionnaire}} (Revolutionary Communist Group (Lebanon)), a Lebanese Trotskyist group

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