G Augmented Major 7th, 1st inversion (B in the bass)
Also written as Gaug(maj7)/B.
Notes, from the bass up
B (bass)D#F#G
The same notes as G Augmented Major 7th (B, D#, F# and G), rearranged so B is the lowest note. Use it to move between chords with smaller jumps across the keyboard.