G flat major seventh flat sixth piano chord - GbM7b6
The G flat major seventh flat sixth chord is a 4-note chord consisting of the notes Gb, Bb, Ebb and F.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as GbM7b6.
Interactive piano diagram for the G flat major seventh flat sixth chord
Chords that are a subset of GbM7b6. These contain less notes but all of them are included in GbM7b6.