| Acronym | Definition |
|---|
| GCB | Good Christian Belles (TV show) |
| GCB | German Convention Bureau (tourism) |
| GCB | Global Corruption Barometer |
| GCB | Global Configuration Block |
| GCB | General Conditions of Business |
| GCB | Ghana Cocoa Board |
| GCB | German Conference on Bioinformatics |
| GCB | Génie Civil et Bâtiment (French: Civil Engineering and Building; Algeria) |
| GCB | Grand Canyon National Park (Amtrak station code; Arizona) |
| GCB | Guides Catholiques de Belgique (French: Catholic Guides of Belgium; Belgium) |
| GCB | Gaming Control Board |
| GCB | Gloucestershire Cricket Board (UK) |
| GCB | Guyana Cricket Board |
| GCB | Gas Circuit Breaker |
| GCB | Greatest Conceivable Being |
| GCB | Generator Circuit Breaker |
| GCB | Graham Colton Band |
| GCB | General Council of the Bar of South Africa |
| GCB | Greater Cincinnati Behavioral Health Services (also seen as GCBHS; Ohio) |
| GCB | Grand Cross of the Bath |
| GCB | Groupement des Cartes Bancaires (French credit card data processor) |
| GCB | Gwinnett Clean Beautiful (Georgia) |
| GCB | Ground Clay Brick |
| GCB | Grupo Capoeira Brasil |
| GCB | Global Consumer Banking (Citibank) |
| GCB | Gilford Community Band (Gilford, NH) |
| GCB | Greenville Concert Band (Greenville, SC) |
| GCB | Glenview Concert Band (Glenview, IL) |
| GCB | Gainesville Community Band (Gainesville, FL) |
| GCB | Gambian Central Bank |
| GCB | Gravity Cutback |
| GCB | Guelph Concert Band (Guelph, Ontario, Canada) |
| GCB | Greensboro Concert Band (Greensboro, NC) |
| GCB | Gateway Concert Band (Buckley, WA) |
| GCB | Gun Control Box (military attack helicopter) |
| GCB | Greenwood Concert Band (Seattle, WA) |
| GCB | Gem City Bands |
| GCB | Gold Coast Bands |