Gaya Ji is a city, municipal corporation and the administrative headquarters of Gaya district and Magadh division of the Indian stat…Gaya Ji is a city, municipal corporation and the administrative headquarters of Gaya district and Magadh division of the Indian state of Bihar. Gaya Ji is 116 kilometres south of Patna and is the state's second-largest city, with a population of 470,839. The city is surrounded on three sides by small, rocky hills, with the Phalgu River on its eastern side.