Gbm11 chord
The G-flat minor eleventh chord (abbreviated "Gbm11 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 minor ninth chord.
In practice, the fifth (D♭) is often omitted from the Gbm11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.
Name
G-flat minor eleventh chord
Notes
G♭ B♭♭ D♭ F♭ A♭ C♭
Intervals
1 ♭3 5 ♭7 9 11
Chord symbol
G♭m11
Alternative symbols
G♭–11 G♭mi11 G♭min11
Type
Hexad (six-note chord)