GMB may refer to:
Arts and media GMB (album), 2012, by hip-hop trio Pac Div Good Morning Britain, a 2014 British breakfast television programme Good Morning Britain (1983 TV programme)
Honours Grand Bauhinia Medal, Hong Kong Great Master of the Order of the Bath, UK/Great Britain
Places Africa The Gambia, by ISO 3166 alpha-3 country code Gambela Airport, Ethiopia, by IATA code
Europe Gardermoen Line (), a high-speed railway Graduates Memorial Building, at Trinity College, Dublin, Ireland Grimsby Town railway station, England, by GBR code
Other uses GMB (trade union), UK Gladding, McBean, American ceramics company Google My Business, former name of Google Business Profile (GBP), a feature of Google Maps for professionals Martin GMB, 1918 US bomber aircraft