GCI

GCI can stand for:

* Guernsey Airport (IATA Code)
* The First Geneva Convention
* Ground-controlled interception i.e. radar-directed fighter aircraft.
* General Circuit Interface ISDN PCM control protocol, equivalent to IOM-2TM.
* General Communications, Inc.
* Geomagnetically induced current
* Global Commerce Initiative
* Great Commission International
* Global Commons Institute
* Grassroots Campaigns, Inc., a progressive political consulting organization.
* Great Coasters International, a company that builds roller coasters.
* Global Consultants Inc., a player in the E-commerce 2.0 space.
* The Global Competitiveness Index
* Glebe Collegiate Institute, a high school in Ottawa, Ontario, Canada.
* Galt Collegiate Institute, a high school in Cambridge, Ontario, Canada.
* Gannett Company Inc., a U.S. newspaper company.
* GCI railcar, a type of railcar used in the 20th century in Belgium.
* Gross Commission Income, a term used in real estate for budgeting purposes.
* Gray Consulting, Inc., a Corporate Meeting and Event Planning Company headquartered in Philadelphia, PA.
* Generic Call Interface, see Regina