The Grupo Música Nova was a Brazilian organisation dedicated to promoting modernist classical music founded in 1963. The original members were composers who had studied in Germany: Gilberto Mendes (a student of Pierre Boulez, Henri Pousseur, and Karlheinz Stockhausen), Willy Corrêa de Oliveira, Damiano Cozzela, Rogério Duprat (a student of Hans-Joachim Koellreutter) and Júlio Medaglia (also a student of Pierre Boulez, and Karlheinz Stockhausen). The group was suspect by the government since several of the composers were associated with the Communist Party of Brazil.
The year before the group formed in 1962 Mendes had founded the pt:Festival Música Nova, held in Santos annually since 1965.
References
Grupo Música Nova Wikipedia(Text) CC BY-SA