구구단 (gugudan) – 정
Track 01 from Single "투유 프로젝트 - 슈가맨2 Part.1"
Release Date: 2018.01.15
구구단 (gugudan) – 스노우 볼 (Snowball)
Track 03 from EP "Act.3 Chococo Factory"
Release Date: 2017.11.08
구구단 (gugudan) – Lucky
Track 02 from EP "Act.3 Chococo Factory"
Release Date: 2017.11.08
구구단 (gugudan) – Chococo
Track 01 from EP "Act.3 Chococo Factory"
Release Date: 2017.11.08
서인국, VIXX (빅스), 구구단 (gugudan), 박윤하, 박정아, 김규선, 김예원, 지율 – 니가 내려와
Track 01 from Single "Jelly Box Jelly Christmas 2016"
Release Date: 2016.12.13
구구단 (gugudan) – Pastel Sweater
Track 06 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – Do it
Track 05 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – Shotgun
Track 04 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – 너에게
Track 03 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – Be Myself
Track 02 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – Not That Type
Track 01 from EP "ACT.5 New Action"
Release Date: 2018.11.06
구구단 (gugudan) – Lovesick
Track 03 from EP "Act.4 Cait Sith"
Release Date: 2018.02.01
구구단 (gugudan) – Silly
Track 02 from EP "Act.4 Cait Sith"
Release Date: 2018.02.01
구구단 (gugudan) – The Boots
Track 01 from EP "Act.4 Cait Sith"
Release Date: 2018.02.01
구구단 (gugudan) – 일기 (2001 Remix.ver)
Track 01 from Single "20세기 소년소녀 OST Part.2"
Release Date: 2017.10.10
구구단 (gugudan) – Maybe Tomorrow
Track 05 from EP "Act.1 The Little Mermaid"
Release Date: 2016.06.28
구구단 (gugudan) – 일기 (Diary)
Track 04 from EP "Act.1 The Little Mermaid"
Release Date: 2016.06.28
구구단 (gugudan) – Good Boy
Track 03 from EP "Act.1 The Little Mermaid"
Release Date: 2016.06.28
구구단 (gugudan) – 구름 위로
Track 02 from EP "Act.1 The Little Mermaid"
Release Date: 2016.06.28
구구단 (gugudan) – Wonderland
Track 01 from EP "Act.1 The Little Mermaid"
Release Date: 2016.06.28
구구단 (gugudan) – 소원 들어주기
Track 05 from EP "Act.2 Narcissus"
Release Date: 2017.02.27
구구단 (gugudan) – 거리
Track 04 from EP "Act.2 Narcissus"
Release Date: 2017.02.27
구구단 (gugudan) – 미워지려 해
Track 03 from EP "Act.2 Narcissus"
Release Date: 2017.02.27
구구단 (gugudan) – 나 같은 애 (A Girl Like Me)
Track 02 from EP "Act.2 Narcissus"
Release Date: 2017.02.27
구구단 (gugudan) – Rainbow
Track 01 from EP "Act.2 Narcissus"
Release Date: 2017.02.27
구구단 (gugudan) – 사랑일 것 같더라
Track 01 from EP "Story About : 썸, 한달 Episode 5"
Release Date: 2017.06.28
구구단 (gugudan) – 이순간을 믿을게
Track 01 from Album "학교 2017 OST"
Release Date: 2017.09.04