Every fingering that fits a hand
1344
moderate
x896
easy
What is true of it
G♯sus4 is G♯, C♯ and D♯ — 1, 4 and 5 counted from G♯.
These are also the notes of C♯sus2/G♯ and D♭sus2/G♯. Which name is right depends on what is underneath and what came before — the notes alone do not decide.
The easiest of the 2 fingerings below is 1344: 4 fingers, held at the 1st fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
Where its notes are on the neck
The brass dots are G♯, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
G♯sus4/C♯
6344
G♯sus4/D♯
x344
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.