G♭ Dominant 7th :: G♭ B♭ D♭ F♭

E
B
G
D
A
E
♭7
♭7
3
G♭
5
♭7
G♭
3
G♭
5
♭7
3
5
3
G♭
♭7
3
5
♭7
G♭
5
3
G♭
5
⬤ ⬤
♭7
♭7
⬤ ⬤