The G-flat major eleventh chord (abbreviated "Gbmaj11 chord") is a six-note chord consisting of the notes G, B, D, F, A, and C. The chord is formed by adding an eleventh to a G-flat major ninth chord.

In practice, the fifth (D) is often omitted from the Gbmaj11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.

Name
G-flat major eleventh chord
Notes
G B D F A C
Intervals
1 3 5 7 9 11
Chord symbol
Gmaj11
Alternative symbols
G11 Gma11 GMA11 GM11
Type
Hexad (six-note chord)

Gbmaj11 chord on piano

Gbmaj11 chord on guitar

Gbmaj11 chord on ukulele

Gbmaj11 chord on the staff