Migato was founded in 1997 by José Gregorio Briceño, the mayor of Cedeño Municipality of Monagas State. "El gato" (the cat) is his nickname and "mi gato" means my cat. At the legislative elections on 30 July of 2000, the party won 1 out of 165 seats in the National Assembly of Venezuela.
Briceño was elected as the governor of Monagas in 2004. The 2005 election gave it 1 National Assembly seat again. Though their influence was significant in Monagas, both victories were mainly due to the alliance with the Fifth Republic Movement, which was the party of the president Hugo Chávez. It merged into PSUV on 2007-10-20.