GCI

GCI can stand for:

Businesses:

• GCI (company), an Alaska-based telecommunications company
• Gannett Company Inc., a U.S. newspaper company whose ticker symbol is GCI
• Great Coasters International, a company that builds roller coasters

Organizations:

• Global Commons Institute, a UK-based climate change campaign
• Grace Communion International, an evangelical Christian denomination based in Glendora, California, United States
• Grassroots Campaigns, Inc., a progressive political consulting organization
• Great Commission International, a US-based religious organization
• Green Cross International, an environmental organisation founded in 1993

Schools and colleges:

• Government College Ikorodu, a college in Lagos State, Nigeria
• Glebe Collegiate Institute, a high school in Ottawa, Ontario, Canada
• Galt Collegiate Institute, a high school in Cambridge, Ontario, Canada

In science:

• Geomagnetically induced current, a manifestation at ground level of space weather
• Glial Cytoplasmic Inclusion, in medicine

In technology:

• GCI railcar, a type of railcar used in the 20th century in Belgium
• Google Code-In, an annual programming contest
• Ground-controlled interception, an air defense tactic using radar-directed fighter aircraft
• General Circuit Interface, an ISDN PCM control protocol equivalent to IOM-2TM
• Generic Call Interface, in the REXX programming language

Other uses:

• Global Competitiveness Index, a world economic index in use since 2004
• Gotham City Impostors, a 2012 video game
• Guernsey Airport (IATA Code), on the island of Guernsey
• First Geneva Convention, establishing standards of international law relating to war, adopted in 1864
• Gross Commission Income, a term used in real estate for budgeting purposes