GCR

GCR (or GCRS) may refer to:

Science

 * 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

Technology

 * 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

Transportation

 * 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)

Other uses

 * 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
 * Groupe Communiste Révolutionnaire (Revolutionary Communist Group (Lebanon)), a Lebanese Trotskyite group