Chief of the Hommiks, and "the biggest, toughest, meanest son of a Seska on the planet". He ruled by right of challenge and, in his own words, "by the strength of my right arm, and by my left arm, and by...er...". His predecessor was Maravik, and he had defeated no less than 26 men in his time as chief, although Cato insisted that Marquin be considered missing since his body was never found after falling off a bottomless cliff. Gunn-Sar had taken the former Seska leader, Nina, as his wife, with no indication of her willingness or otherwise in this matter. He appeared to have no children.
Avon defeated him in single combat with a heliofusion rod, but failed to depose him. Dayna challenged him to single combat as well, and needed the surreptitious help of Pella and Kate to win. Gunn-Sar died as a result, and Nina vowed that the Hommiks would leave to settle down elsewhere.
Despite his male chauvinist outlook, he was seen wielding a needle at one point. He had heard of computers, but did not know what they were, and Cato told Avon that Gunn-Sar regarded a computer as "some kind of god". Cato also described him as "stupid", but he appeared to be a popular ruler.
The first gunship mentioned in the series was in Shadow, when a gunship was sent out to attack Liberator from Space City. This was presumably a space-going vessel, probably very short-range. Cally destroyed it with the neutron blasters.
The Federation force on Helotrix was equipped with gunships, and Hunda mentioned to Leitz that his 4th column had shot down two of them.
Justin told Dayna that the scientific personnel on Bucol-2, when leaving the planet towards the end of Intergalactic War, were shot down by an enemy - presumably alien - gunship minutes after take-off.