Ab Major 9#11, 3rd inversion (G in the bass)
Also written as Abmaj9#11/G.
Notes, from the bass up
G (bass)A#DG#B#D#
The same notes as Ab Major 9#11 (G, A#, D, G#, B# and D#), rearranged so G is the lowest note. Use it to move between chords with smaller jumps across the keyboard.