piano chord
G♯7sus4
G♯1C♯4D♯5F♯♭7
A dominant seventh with the fourth standing in for the third.
Written the other way round it is A♭7sus4 — the same twelve keys on a piano, a different piece of notation.
What is true of it
G♯7sus4 is G♯, C♯, D♯ and F♯ — 1, 4, 5 and b7 counted from G♯.
On an instrument that cannot reach all 4, the 5 goes first, in that order.