Gb6/9 chord
Gb six nine
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Gb
G
Ab9
A
Bb
B
C
Db
D
Eb
E
F
Gb
G
Ab
C
C
Db
D
Eb6
E
F
Gb
G
Ab
A
Bb
B
C
Eb
E
Eb
E
F
Gb1
G
Ab
A
Bb
B
C
Db
D
Eb
E
Gb
A
Ab
A
Bb3
B
C
Db
D
Eb
E
F
Gb
G
Ab
A
Bb
3
5
7
10
The Gb6/9 chord has the formula 1, 3, 6, 9 with notes Gb, Bb, Eb, Ab
The six nine chord has a rich and somewhat ambiguous sound. It can often be used as a substitute for major chords or major seventh chords.