Gritti Morlacchi was then named by Bishop Giampaolo Dolfin as headmaster of the Seminary of Bergamo.

Later he was canon of the cathedral and was then named pastor of the Parish of Sant' Alessandro in Colonna in Bergamo.

During his episcopacy, the entire territory of his diocese was part of the Kingdom of Lombardy–Venetia and he defended many times the autonomy of the Church against the Austrian authorities.

Bishop Morlacchi appointed as teachers at the seminary many priests considered close to the ideas of Cornelius Otto Jansen.

During the turmoil of 1848 he supported the idea of a unified Italy under Carlo Alberto.