G major

G major (or the key of G) is a major scale based on G, with the pitches G, A, B, C, D, E, F♯, and G. Its key signature has one sharp, F♯.

G major

Relative key	E minor
Parallel key	G minor
Dominant key
Subdominant
Notes in this scale
G, A, B, C, D, E, F#, G

Its relative minor is E minor, and its parallel minor is G minor.

In popular culture

G major is the most common key for music to be in on the Spotify music streaming service. The key can easily be played on either a piano or a guitar, hence why it appears often in music.