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He was born in New York City. He received an A.B. degree from Dartmouth College in 1926 and an M.D. degree from the Columbia University College of Physicians and Surgeons in 1930.
He specialized in ear, throat and nose disorders and allergies at his practice in White Plains, New York. He later moved to California to practice in the fields of allergies and nutrition. He lived in several places around California while practicing medicine.
He was a founding member of the John Birch Society in California from 1958-1961. “Granville proclaimed that a secular nation was condemned to tremble in fear of atomic annihilation; that it must sit and wait for the dropped curtain and the closing gate.”
- Los Angeles County Medical Commission, 1968-1979
- President of the Price-Pottenger Nutrition Foundation
- President of the Pure Water Association of America