A younger son of gentry from the North Riding of Yorkshire, he made his career as a banker in London and held finance-related public offices for most of his life.
Through the bank he developed a friendship with Robert Walpole, the Prime Minister from 1721 to 1742, who appointed him in 1714 as cashier to the pay office.
[1] Walpole brought Gibson into the House of Commons at the 1722 general election as a Member of Parliament (MP) for Marlborough.
[3] He held that seat until he stood down at the 1734 general election, but was brought in two years later at an uncontested by-election for Yarmouth.
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