Gbmaj9 chord

The G-flat major ninth chord (abbreviated Gbmaj9 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 the G-flat major seventh chord.

In practice, the fifth (D♭) is sometimes omitted from the Gbmaj9 chord because it's not always possible to play all notes simultaneously.