The agency was established to meet the management needs of Jaejoong, Junsu and Yoochun, then members of TVXQ, after the trio filed a lawsuit against their former record label, S.M. Entertainment.
Famous people associated with Gongju include member of popular boy band JYJ, YoungWoong JaeJoong (also known as Hero), professional baseball player Chan-ho Park, and 2009 new singer Taegoon who were born there.
The group originally consisted of five members, including U-Know Yunho, Max Changmin, Hero Jaejoong, Micky Yoochun, and Xiah Junsu.