| Acronym | Definition |
|---|
| GCM | General Circulation Model |
| GCM | Google Cloud Messaging (mobile technology) |
| GCM | Galois/Counter Mode (cryptography) |
| GCM | Global Climate Model |
| GCM | Grand Corps Malade (poet) |
| GCM | Geriatric Care Managers |
| GCM | Global Circulation Model |
| GCM | Golf Course Maintenance |
| GCM | Gnome Clipboard Manager |
| GCM | Google Checkout Merchant |
| GCM | Global Commerce Management |
| GCM | Global Call Management |
| GCM | Global Commodity Manager |
| GCM | General Court-Martial |
| GCM | Global Campaign for Microbicides (disease prevention) |
| GCM | Growth Curve Model |
| GCM | Good Conduct Medal |
| GCM | Graham Capital Management (Rowayton, CT) |
| GCM | Gary-Chicago-Milwaukee (transportation corridor) |
| GCM | Graduate College of Management (Southern Cross University) |
| GCM | Global Community Monitor (est. 2001; El Cerrito, CA) |
| GCM | Garbage Can Model (organizational choice) |
| GCM | Groupement de Commandos de Montagne (French: Group of Mountain Commandos) |
| GCM | Gross Combination Mass |
| GCM | Graphic Communications Management |
| GCM | General Counsel Memorandum (IRS) |
| GCM | Groupement des Compagnons Moulistes (French: Group of the Companions Mold Makers) |
| GCM | Great Commission Ministries (international church and missions organization) |
| GCM | Generalized Conversion Matrix (engineering) |
| GCM | Great Cities Missions |
| GCM | Greenwich Capital Markets |
| GCM | Greedy Channel Management |
| GCM | Gilbert-Cell Mixer (electronics) |
| GCM | Global Citizens Movement |
| GCM | Génie Climatique Mispouillé (French climate company) |
| GCM | Greatest Common Measure |
| GCM | Greatest Common Multiple |
| GCM | Global Christian Movement |
| GCM | Ghana Chamber of Mines (Accra, Ghana) |
| GCM | General Consumer Market (sector) |
| GCM | General Conference Meeting (International Atomic Energy Agency) |
| GCM | Gross Contribution Margin (finance) |
| GCM | Government Created Money |
| GCM | GIG (Global Information Grid) Content Management (US DoD Architectural Vision) |
| GCM | Growing Christian Ministries (est. 1971; Westerly, RI) |
| GCM | Geodesic Constant Method |
| GCM | Ground Control Message |
| GCM | Graph Computation Models (workshop) |
| GCM | Gun Control Module |
| GCM | General Control Module |
| GCM | Gulf Coast Marine |
| GCM | Golay Coding Modulation |
| GCM | Grand Cross of the Most Illustrious Order of Merit (Antigua and Barbuda) |
| GCM | Chief Counsel's Memorandum (IRB) |
| GCM | General Clutter Model (radar) |
| GCM | Group Controller Module (DSC) |
| GCM | Guidance and Control Module |
| GCM | General Claims Memo (State Farm Insurance) |
| GCM | Guard Channel Method |
| GCM | General Care Manager |
| GCM | Global Customer Relationship Management |
| GCM | Global Capability Matrix |
| GCM | Gulf Coast Motor Lines, Inc. (Gulf Coast Gray Line) |
| GCM | Gwinnett Commercial Maintenance (Atlanta, GA) |
| GCM | Government Contract Manager |
| GCM | Guest Communication Manager |
| GCM | Generalized Coupling Model (electromagnetics) |
| GCM | Good Central Maintained Vision (ophthalmology; used with infants in testing) |
| GCM | Grand Cayman Island, Cayman Islands - Owen Roberts International Airport (Airport Code) |
| GCM | Global Change Management, Inc. (Winter Park, FL) |