Monastic Formation
According to his life, Gregory entered the community of Saint Daniel of Pereyaslavl while still a youth and was tonsured a monk with the name Gerasimus. He remained under Daniel's guidance for some twenty-six years at the Trinity Danilov Monastery.
Tradition relates that during these years he labored as a shoemaker, making footwear for the infirm, and that he was known as a strict ascetic before he withdrew to seek a more solitary life.