The patron of Gamalero is San Lorenzo (Saint Lawrence), celebrated on 10 August, the day on which, organised by the Comune and the Pro loco, the sagra dell'agnolotto al sugo di cinghiale (agnolotti with wild boar sauce festival) is held; the municipality holds the Chiesa di San Lorenzo.
In July, August and September the Festival Letterario di San Lorenzo (San Lorenzo literary festival) takes place, run by the «Amici del Festival letterario di San Lorenzo», the Comune and the Pro loco. The municipality also holds the Chiesa di San Rocco.