A G♯ Major (G♯) chord contains the notes G#, D#, C. It is built from the major formula 1 - 3 - 5, with G# as the root.
Is G♯ major the same shape as F♯ major?
Yes, moved two frets higher. Both come from the open E form with a full barre behind it, so once one is comfortable the other costs nothing but position. Sliding between them is a clean way to hear how a major triad keeps its character anywhere on the neck.