piano chord
G♯m7♭5
G♯1B♭3D♭5F♯♭7
A diminished triad with a minor seventh rather than a diminished one — half diminished, and not the same chord as dim7.
Written the other way round it is A♭m7♭5 — the same twelve keys on a piano, a different piece of notation.
What is true of it
G♯m7♭5 is G♯, B, D and F♯ — 1, b3, b5 and b7 counted from G♯.
These are also the notes of Bm6/G♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.