Gee was born in 1667, probably in London, and died there in 1730. Little is known of his background, but by 1700 he had built up a thriving mercantile business and was trading with the American colonies. A Quaker, he was friendly with William Penn and was one of the seven mortgagees who helped rescue the colony of Pennsylvania when Penn ran into financial difficulties. He was also in partnership with Augustine Washington, father of the future American president; in 1718, Gee and Washington were partners in a company called Principio, which aimed to exploit iron ore resources in Maryland and, later, Virginia. It may be assumed that Gee had wide commercial interests in America and the West Indies.
From The Biographical Dictionary of British Economists in Oxford Reference.