About the G#sus2 chord
To play G# suspended 2nd, use the first shape above. Use your index finger to barre the 1st fret across the G, C, E, and A strings. Place your ring finger on the 3rd fret of the C string and your pinky finger on the 4th fret of the E string. Strum all four strings and check that each one rings cleanly.
Root
G#
Quality
Suspended 2nd
Notes
G# · A# · D#
How the G#sus2 chord works
G#
Root(1)
The home note. It gives the chord its name.
A#
Major second(2)
An open-sounding second that replaces the third.
D#
Perfect fifth(5)
Adds strength and stability.