The G half-diminished seventh chord (abbreviated "Gm7(b5) chord") is a four-note chord consisting of the notes G, B, D, and F. The chord is formed by lowering the fifth of a G minor seventh chord a half step.

Name
G half-diminished seventh chord
Synonyms
G half-diminished chord G minor seventh flat five chord
Notes
G B D F
Intervals
1 3 5 7
Chord symbol
Gm7(b5)
Alternative symbols
Gø Gø7 Gm7b5 G7(b5) Gmi7(b5) Gmin7(b5)
Type
Tetrad (four-note chord)

Gm7(b5) chord on piano

Gm7(b5) chord on guitar

Gm7(b5) chord on ukulele

Gm7(b5) chord on the staff