GEA is a corporate brand that owns several educational brands including Back2School, Green Tag, Educamart, Aula24horas, and El Arca Editorial. These brands provide school supplies, uniforms, academic resources, and religious publications. Marketing at GEA involves gathering feedback, analyzing markets and indicators, maintaining brand blogs and social networks, and providing information to sales teams. The goal is to create happy customer experiences and support the brands and institutions they serve.