Gabe Jackson grew up in Liberty, Mississippi where he attended Amite County High School. He was rated a three-star recruit and the No. 91 overall lineman. He signed with Mississippi State over Southern Mississippi Univeristy. After redshirting his freshman year, Jackson started at left guard and was named an SEC All-Freshman selection by the coaches. He posted 40 knockdown blocks and helped the Bulldogs rush for over 200 yards on seven different occasions.