G band

G band may refer to:
 * G band (IEEE), a millimetre wave band from 110 to 300 GHz
 * G band (NATO), a radio frequency band from 4 to 6 GHz
 * G band, representing a green hued wavelength of $464 nm$ in the photometric systems adopted by astronomers
 * G banding, in cytogenetics
 * The G Band, alternative name of The Glitter Band