He was a son of Rorgon of Maine by his wife Bilechilde.
Gauzfrid and his brother Rorgon II, who was Count of Maine at the time, revolted against Robert.
The two brothers allied with Salomon of Brittany in opposition to Robert the Strong.
In 865, Rorgon II died and Gauzfrid became the new Count of Maine.
The same year, Charles the Bald deprived Adalard's family of their land in Neustria, and awarded it to Gauzfrid.