What school did Guru Nanak attend?

Answer 1

At the age of six he was sent to the village school teacher for schooling in reading and writing in Hindi and mathematics. He was then schooled in the study of Muslim literature and learned Persian and Arabic

Answer 2

He did not attend any college/university at the time, because it was not required. However at the age of six, he was sent to Gopal Pandha to learn Hindi and Math. Years later, he learned Arabic and Persian