GCI

GCI may refer to:

Education

 * Galt Collegiate Institute, in Cambridge, Ontario, Canada
 * Glebe Collegiate Institute, in Ottawa, Ontario, Canada
 * Global Change Institute, at the University of the Witwatersrand, Johannesburg, South Africa
 * Global Cinematography Institute, in Los Angeles, California, United States
 * Government College Ikorodu, in Lagos State, Nigeria

Environmentalism

 * Glen Canyon Institute, in Utah, United States
 * Green Cross International, an International environmental organization
 * Green Campus Initiative (UCT), a student organization at the University of Cape Town

Science, medicine and technology

 * GCI (company), an American telecommunications company
 * Gaussian correlation inequality
 * Generalized conversational implicature
 * Geomagnetically induced current
 * Glial cytoplasmic inclusions, a type of abnormal protein deposit in the brain
 * Google Code-in, an annual programming contest
 * Ground-controlled interception
 * Grating-coupled interferometry, a biophysical characterization method
 * Global Caller Identification, a parameter used in telecoms protocols

Transportation

 * Guernsey Airport, in the Channel Islands
 * GCI coach, the staple of Belgian passenger rail traffic in the steam era

Other uses

 * International Conference on the Situation in Venezuela (Spanish: Grupo de Contacto Internacional)
 * First Geneva Convention
 * Gannett Company, an American newspaper publisher
 * Getty Conservation Institute, an American art conservation organization
 * Glass Ceiling Index, an index for visualizing economic inequality
 * Global Competitiveness Index
 * Grace Communion International, a Christian denomination
 * Grassroots Campaigns, Inc., an American political consulting organization
 * Great Coasters International, an American roller coaster builder
 * Great Commission International, an American religious organization