F Minor 9b5, 4th inversion (G in the bass)
Also written as Fm9b5/G.
Notes, from the bass up
G (bass)FAbCbEb
The same notes as F Minor 9b5 (G, F, Ab, Cb and Eb), rearranged so G is the lowest note. Use it to move between chords with smaller jumps across the keyboard.