Gorreto is on the left side of the Trebbia River close to the confluence with the Dorbecca Stream that flows down from the Alfeo Mountain slopes.  Gorreto is a boundary village as at the end of it the Province of Piacenza begins. It seems the name Gorreto comes from "gorre", which are bushes of the willow family that grow along the river.
The village belonged to Ottone Town and later to the Malaspinas until a member of this family, Morello, surrended it to the Centuriones.
Even if the Malaspinas’ castle is in ruin, the town wall and various entrance gates being destroyed, the built-up areas still show a medieval form. Well-preserved is the Centuriones’ Palace built during the 17th century by  the typical white and black façade. At those times the fortified village was a one-off in the whole Trebbia Valley and it got to  maintain the original features up to the beginning of the 20th century when part of the town wall was demolished making room to new residences and the village lost its historical and architectural identity.