G Major 7#11, 1st inversion (B in the bass)
Also written as Gmaj7#11/B.
Notes, from the bass up
B (bass)DF#C#G
The same notes as G Major 7#11 (B, D, F#, C# and G), rearranged so B is the lowest note. Use it to move between chords with smaller jumps across the keyboard.