About the G#maj7 chord
To play G# major 7th, use the first shape above. Place your index finger on the 1st fret of the G string, your middle finger on the 3rd fret of the C string, your ring finger on the 3rd fret of the E string, and your pinky finger on the 3rd fret of the A string. Strum all four strings and check that each one rings cleanly.
Root
G#
Quality
Major 7th
Notes
G# · B# · D# · F##
How the G#maj7 chord works
G#
Root(1)
The home note. It gives the chord its name.
B#
Major third(3)
The major-third interval that establishes the chord's major base.
D#
Perfect fifth(5)
Adds strength and stability.
F##
Major seventh(7)
Adds a major seventh above the root.