The document of the Galician People's Union (UPG) The youth of the party, in February 1977, included the decision to create the UMG due to the increase in the number of supporters, members and activists of the UPG in high school or that were young workers.

The UMG defined itself as the Patriotic and communist organization of Galiza and the youth wing of the Galician People's Union.

[2] In 1989 the UMG participated in the creation of Galiza Nova, the youth wing of the Galician Nationalist Bloc (BNG).

Since then, UMG has subordinated its political action to Galiza Nova, rarely doing solo acts.

Like the UPG, the UMG declares itself communist and nationalist, and believes that the establishment of socialism in Galiza necessarily passes by the previous national liberation of the country.