G♭ Major 7th (♭5)
::
G♭
B♭
C
F
B
F♯
D
A
G♭
♭5
3
⬤
7
♭5
⬤
3
G♭
⬤
⬤
7
♭5
⬤
G♭
⬤
3
7
⬤
G♭
⬤
♭5
3
7
⬤ ⬤
G♭
⬤ ⬤