G-sharp major

G♯ major

Relative key	E♯ minor enharmonic: F minor
Parallel key	G♯ minor
Dominant key	D♯ major enharmonic: E♭ major
Subdominant	C♯ major enharmonic: D♭ major
Enharmonic	A♭ major
Component pitches
G♯, A♯, B♯, C♯, D♯, E♯, F, G♯

G-sharp major is a theoretical key based on the musical note G-sharp, consisting of the pitches G♯, A♯, B♯, C♯, D♯, E♯ and F. Its key signature has six sharps and one double sharp.^[1]

Although G♯ major is usually notated as the enharmonic key of A♭ major, because A♭ major has only four flats as opposed to G♯ major's eight sharps (including the F), it does appear as a secondary key area in several works in sharp keys - most notably in the Prelude and Fugue in C-sharp major from Johann Sebastian Bach's The Well-Tempered Clavier, Book 1. The G-sharp minor prelude (and, in some editions, the fugue) from the same set ends with a Picardy third, on a G-sharp major chord.

G-sharp major is tonicised briefly in several of Frédéric Chopin's nocturnes in C-sharp minor. A section in the second movement of Chopin's Piano Concerto No. 1 is in G-sharp major, although the key signature has 4 sharps. The end of the exposition of the second movement Charles-Valentin Alkan's Grande sonate 'Les quatre âges', subtitled Quasi-Faust, is in G-sharp major, albeit written with a six-sharp key signature (the movement opens in D-sharp minor and ends in F-sharp major).

The final pages of A World Requiem by John Foulds are written in G-sharp major with its correct key signature shown in the vocal score including the F.

References

Scales and keys

Diatonic scales and keys
	Flats Sharps Major minor Major minor 0 C a C a 1 F d G e 2 B♭ g D b 3 E♭ c A f♯ 4 A♭ f E c♯ 5 D♭ b♭ B g♯ 6 G♭ e♭ F♯ d♯ 7 C♭ a♭ C♯ a♯ 8 F♭ d♭ G♯ e♯
The table indicates the number of sharps or flats in each scale. Minor scales are written in lower case.