CGB may refer to: covertgoBlue, a popular youtube content creator 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 & Governmental Affairs Bureau, a part of the Federal Communications Commission Game Boy Color (product code CGB-001), Nintendo Marechal Rondon International Airport (IATA code), in Cuiabá, Brazil Station code for Cigombong railway station