San Pietro in Gu is a comune in the Province of Padua in the Italian region Veneto, located about 50 kilometres northwest of Venice and about 25 kilometres northwest of Padua. San Pietro in Gu borders the following municipalities: Bolzano Vicentino, Bressanvido, Carmignano di Brenta, Gazzo, Grantorto, Pozzoleone, Quinto Vicentino.