Gary Duncan (born Gary Ray Grubb, September 4, 1946 – June 29, 2019), also known as Gary Cole, was an American guitarist and singer. He is best remembered as a member of San Francisco psychedelic rock group Quicksilver Messenger Service. He was also a member of the Ratz and the Brogues. Duncan was born in San Diego, California and grew up in Woodland.
In June 2019, Duncan had a seizure after he had a "severe fall and hit his head." He died on June 29, 2019 in Woodland, California. He was 72.[1]