Gnatios was the Patriarch of Videssos during the reigns of Anthimos III and Krispos as well as the regency of Petronas, who was Gnatios' cousin. He was a moderate in the theological debates that took place in Videssian society, but was considered dangerous due to his relationship with his cousin, a holder of much power in the empire. A year or so after Petronas began his revolt, the civil war was ended when Krispos destroyed the rebels. Gnatios was found among a pack of prisoners and sent back to his monastery.