|Relative key||E♯ minor
enharmonic: F minor
|Parallel key||G♯ minor
enharmonic: A♭ minor
|G♯, A♯, B♯, C♯, D♯, E♯, F, G♯|
For clarity and simplicity, G-sharp major is usually notated as its enharmonic equivalent of A-flat major; however, 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 fugue from the same set end with a Picardy third in G-sharp major.
G-sharp major is tonicised briefly in several of Frédéric Chopin's nocturnes in C-sharp minor. A section in the third 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, although written with a six-sharp key signature (the movement opens in D-sharp minor and ends in F-sharp major).
- Thomas Busby (1840). "G Sharp Major". A dictionary of three thousand musical terms. revised by J.A. Hamilton. London: D'Almaine and Co. p. 55.
Scales and keys 
|Diatonic scales and keys|
|The table indicates the number of sharps or flats in each scale. Minor scales are written in lower case.|