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