Gb 11th chord

Gb11 chord for piano presented by keyboard diagrams.
Explanation: The G flat eleventh is a six-note chord. To avoid dissonance the third (Bb) is normally omitted. The chord is also often played inverted. The chord is abbreviated as Gb11.
Omissions: Gb11(no3): Gb - Db - E - Ab - B; Gb11(no9): Gb - Bb - Db - E - B.
Theory: The Gb eleventh chord is constructed by adding a third to a ninth chord.