G♭ Minor 7th (♭5)
::
G♭
A
C
E
C
G
D
A
E
B
♭5
♭3
♭7
♭5
♭3
♭7
G♭
⬤
♭5
⬤
♭7
G♭
⬤
♭5
♭3
♭7
⬤
G♭
⬤
♭3
♭7
G♭
⬤
♭5
⬤
♭3
♭7
G♭
⬤
♭5
♭3
G♭
⬤ ⬤
♭5
♭3
♭7
⬤ ⬤