The PNG was joined the same year by the small Partido Galeguista (Nationalist), leading to the creation of the PNG–PG.

In September 1987, the PNG–PG supported a motion against the Galician president Xerardo Fernández Albor, that led to the fall of the government.

The party entered the new socialist government of Fernando González Laxe taking control of two consellerías (autonic ministers).

In 1987 and 1989 participated in the elections to the European Parliament together with Eusko Alkartasuna and the Republican Left of Catalonia without obtaining representation.

[2] In late March of that year the party announced that they were working on a common project of a Galician nationalist centre party, along with Terra Galega (TEGA), Alternativa Popular Galega (APG), Converxencia XXI (CXXI) and the Partido Galeguista Demócrata (PGD).