All Trade unions
|Gasworkers Federation Trade Union
|General Municipal and Boilermakers Amalgamated Trade Union
|General Municipal & Boilermakers Union
|General & Municipal Workers' Union
|General Union of Loom Overlookers
|General, Municipal, Boilermakers' and Allied Trade Union (GMBATU) before 1987.
|GMB Young Workers
|Network for all GMB members aged up to and including 30.
|Gold and Silver Allied Trade Union
|Graphical, Paper and Media Union
|formed 1991 from SOGAT and NGA
|Greater London Council Staff Association