He was recruited as a goodwill ambassador for the K-League ahead of the 2018 season. Since being appointed as a goodwill ambassador for the K-League, he conducted contents such as joint broadcasting with soccer players, visiting K-League stadiums, and participating in K-League commentary. He was a digital commentator for Munhwa Broadcasting Corporation (MBC) at the 2018 FIFA World Cup and the 2018 Asian Games. Gamst won a special award at the 2018 K-League Awards, showing such vigorous activities in the football field. He has also appeared on terrestrial broadcasting since 2018, appearing as a guest of the entertainment Radio Star, and as a cameo of drama Secrets and Lies. He also participated in the Real Man 300 - Special Warfare School. For such activities, Gamst won the 2018 MBC Entertainment Awards for Best New Male Artist in Variety.
