Ab Augmented Major 7th, 3rd inversion (G in the bass)
Also written as Abaug(maj7)/G.
Notes, from the bass up
G (bass)G#B#E
The same notes as Ab Augmented Major 7th (G, G#, B# and E), rearranged so G is the lowest note. Use it to move between chords with smaller jumps across the keyboard.