My husband has an unexpired green card but has been out of the country for 1 year and 2 months. He is planning to come to Colorado on October.

A Lawful Permanent Resident who has been outside the U.S. without a reentry permit for 1 year or longer is presumed to have abandoned his green card.  Therefore, at entry, he will be given a choice to 1) enter the U.S. and defend his green card in immigration deportation proceedings or 2)  not enter.  He should chose the first option and then hire an experienced immigration attorney to defend him.