Gammalite was an Australian bred Standardbred racehorse who was the first Standardbred to win a (AUD)$1 million in Australia. He was foaled in 1976 and was by Thor Hanover (USA) and his dam was High Valley by Intangible (USA). He was owned by Leo and Maureen O'Connor of Terang and regarded as one of Australia's most successful pacers. Gammalite was the Australasian Pacers Grand Circuit champion for the years of 1982, 1983, and 1984, and twice won the Inter Dominion Pacing Championships Grand Final. 
In 1982 and 1984 he won the Australian Harness Horse of the Year award.
Gammalite won $1,386,480 during his racing career.