San Pietro in Gu is a comune (municipality) in the Province of Padua in the Italian region Veneto, located about northwest of Venice and about northwest of Padua.
San Pietro in Gu borders the following municipalities: Bolzano Vicentino, Bressanvido, Carmignano di Brenta, Gazzo, Grantorto, Pozzoleone, Quinto Vicentino.