From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Ginyu puts his hands to his sides and charges purple energy spheres. He then shouts, "You're mine!" as he puts his hands forward and fires multiple energy waves at his opponent, inflicting a high amount of damage.
Dragon Ball Z
Ginyu used this attack in his battle against Son Goku on Planet Namek. Irritated by Ginyu's incessant laughter, Goku ordered him to leave Planet Namek but was forced to deflect Ginyu's energy sphere attacks to Ginyu’s amusement. Ginyu decided to step things up a bit and attacked Goku with the Galaxy Dynamite, creating a huge explosion. As the smoke cleared, however, Goku was barely phased.
Another attack existed in which Ginyu fired a barrage of red/orange energy spheres. This may or may not be a variation of the Galaxy Dynamite.