The G-flat dominant minor ninth chord (abbreviated "Gb7(b9) chord") is a five-note chord consisting of the notes G, B, D, F, and A. The chord is formed by adding a major ninth to a G-flat dominant seventh chord.

In practice, the fifth (D) is often omitted from the Gb7(b9) chord because it's not always possible to play all notes simultaneously.

Name
G-flat dominant minor ninth chord
Notes
G B D F A
Intervals
1 3 5 7 9
Chord symbol
G7(b9)
Alternative symbol
G7b9
Type
Pentad (five-note chord)

Gb7(b9) chord on piano

Gb7(b9) chord on guitar

Gb7(b9) chord on ukulele

Gb7(b9) chord on the staff