C 13#11, 2nd inversion (G in the bass)
Also written as C13#11/G.
Notes, from the bass up
G (bass)BbDF#ACE
The same notes as C 13#11 (G, Bb, D, F#, A, C and E), rearranged so G is the lowest note. Use it to move between chords with smaller jumps across the keyboard.