Kim Gwang Hyun, known professionally as GK, is a South Korean singer, dancer and member of DKB (다크비). He graduated from Jamil High School and later obtained a bachelor's degree in K-Pop from Kookje University. He made his debut in February 2020 as the group's main rapper and producer with their first mini-album, "Youth". They are managed by Brave Entertainment (브레이브 엔터테인먼트). (Source: MyDramaList) Watch drama online for free.