F 13b9, 4th inversion (Gb in the bass)
Also written as F13b9/Gb.
Notes, from the bass up
Gb (bass)DFACEb
The same notes as F 13b9 (Gb, D, F, A, C and Eb), rearranged so Gb is the lowest note. Use it to move between chords with smaller jumps across the keyboard.