지케이 (GK) – Go Stupid (바보같이)
Track 02 from Single 'I DO CARE'
지케이 (GK), AB, 권썩 – 방구석 (Room Pain) (Feat. U-Prime)
Track 01 from Single "방구석 (Room Pain) (Feat. U-Prime)"
Release Date: 2015.10.23
지케이 (GK) – 너가 아님 난 안돼 (Feat. VINCI)
Track 01 from Single "너가 아님 난 안돼"
Release Date: 2018.02.02