CGB may refer to: Central Guard Bureau of the General Office of the Chinese Communist Party Chorionic gonadotropin beta, a protein encoded by the CGB gene Christian Trade Union Federation of Germany Compagnie des Chemins de Fer de Grande Banlieue, a defunct railway in France Consumer and Governmental Affairs Bureau, a part of the U.S. Federal Communications Commission Craigieburn railway station, Melbourne Game Boy Color (product code CGB-001), Nintendo Marechal Rondon International Airport (IATA code), in Cuiabá, Brazil Station code for Cigombong railway station