Gonzaga, officially the Municipality of Gonzaga, is a municipality in the province of Cagayan, Philippines. According to the 2020 census, it h…Gonzaga, officially the Municipality of Gonzaga, is a municipality in the province of Cagayan, Philippines. According to the 2020 census, it had a population of 41,680. The original inhabitants of Gonzaga were Negritos, especially members of Aeta tribes. The first recorded name of the area was Gampao, an Aeta word meaning 'mountainous,' later changed to Wangag.