| Acronym | Definition |
|---|
| GCA | Giant Cell Arteritis |
| GCA | Greeting Card Association |
| GCA | Grace Christian Academy |
| GCA | Ground Control Approach (radar landing system) |
| GCA | Ground Controlled Approach |
| GCA | Gun Control Act of 1968 |
| GCA | Groupe Charles André (French transport company) |
| GCA | Government Contracting Activity |
| GCA | Glycocholic Acid |
| GCA | Graphic Communication Association |
| GCA | Grid Computing and Applications |
| GCA | Game Control Adapter |
| GCA | Gas Cost Adjustment |
| GCA | Georgia Chiropractic Association |
| GCA | Gulf Coast Avionics (Florida) |
| GCA | Georgia Council for the Arts |
| GCA | Génie Civil d'Armor (French: Engineering Armor) |
| GCA | Graphic Communications Association |
| GCA | Global Communications Agency |
| GCA | Gas Chromatography Analysis |
| GCA | Greig City Academy (UK) |
| GCA | Global Coalition for Africa |
| GCA | General Combining Ability |
| GCA | Government Controlled Area |
| GCA | General Contractors Association |
| GCA | Georgia Center for Assessment (University of Georgia) |
| GCA | Greek Cypriot Administration |
| GCA | Grains Council of Australia |
| GCA | Greater-Cincinnati Area |
| GCA | Golf Clubmakers Association |
| GCA | Grade Correspondence Analysis (data clustering) |
| GCA | going concern assumption |
| GCA | Groupe Chiroptères Aquitaine (French bat group) |
| GCA | Guidance and Control Assembly |
| GCA | Georgia-Cumberland Academy (Calhoun, GA) |
| GCA | Great Circle Associates |
| GCA | Grant Contract Accounting (various organizations) |
| GCA | Growing Community Assets (Big Lottery Fund; UK) |
| GCA | Gross Construction Area |
| GCA | Generation Control Application (various companies) |
| GCA | Galiano Conservancy Association (est. 1989; Canada) |
| GCA | Garment Contractors Association |
| GCA | Gold Circle Award (various organizations) |
| GCA | Gilles Charignon Architectures (French architecture firm) |
| GCA | Gaming Control Act |
| GCA | Graduate Cost Analysis |
| GCA | Gain-Controlled Amplifier |
| GCA | General Communications Architecture |
| GCA | Ginet Courtage d'Assurances (French insurance brokerage) |
| GCA | Goa Cricket Association |
| GCA | General Customs Administration (China) |
| GCA | General Communications Architecture (Ingress) |
| GCA | GameCube Advanced (website) |
| GCA | Groupement des Conventions d'Assurances (French: Insurance Grouping of Conventions) |
| GCA | Geophysical Corporation of America (defunct manufacturing company) |
| GCA | Glasgow Christian Academy (Glasgow, KY) |
| GCA | Gedatsu Church of America (Raymond, CA) |
| GCA | General Commercial Availability |
| GCA | Gestion Conseil & Assistance (French: Management Consulting & Assistance) |
| GCA | Gas Conditioning Assembly |
| GCA | Generator Coordinate Approximation |
| GCA | Ground Control Airborne |
| GCA | Gunite Contractors Association |
| GCA | Geodesic Cone Array (Lockheed) |
| GCA | GNOPP Constrained Assets |
| GCA | Guidance Counselor Application (ARISS) |
| GCA | Ground Control Apparatus |
| GCA | Global Climate Agency (Switzerland) |