Gamu is a fourth class municipality in the province of Isabela, Philippines. According to the 2010 census, it had a population of 28,657 people. While not a commercially thriving town, it lies near Ilagan City and Cauayan, communities with banks, hospitals, and places of entertainment.The municipality is the site of the 5th Infantry Division of Philippine Army as its infantry unit in Northern Luzon. The Infantry is located in Barangay Upi of this town headed by General Joel P. Ibañez.