Green Card renewal for Native American born in Canada?

My wife and step-son were issued a Green Cards when I received mine in 2001. My work paid for everything and he was considered under my application through Consular Processing. He is 50% Native American from his biological Father and was born in Canada. He is now 20 and his card is expiring. Should he just renew it via the standard way or should he do it a different way bc of the fact that he is Native American?