GCB

GCB may refer to:

• Gaming control board
• GCB (TV series), American television series
• GCB (McDonald's), a Malaysian product of McDonald's
• GCB Bank, formerly Ghana Commercial Bank
• Generator circuit breaker
• Gilmore City–Bradgate Community School District
• Giro Commercial Bank, a defunct commercial bank in Kenya
• Global Corruption Barometer
• Gloucestershire Cricket Board, in England
• Glucocerebrosidase, enzyme
• (Dame or Knight) Grand Cross of the Order of the Bath
• Great Calcite Belt, a large region of the ocean with high concentrations of calcite
• Green Camel Bell, Chinese environmental organization
• Groupe Communiste Burkinabè, defunct political party of Burkina Faso
• Guides Catholiques de Belgique, French-speaking Belgian Girl Guiding organization