Dudley Gatewood was born about 1718 in Essex County, Virginia. He moved to Spotsylvania County, Virginia about 1740 where he was a land owner and slave holder. He married Sarah (Sanders?) about 1740. In Spotsylvania County he served as a Constable and as the Ensign of a company of light foot in the county militia. He moved to Bedford County, VA with his wife and son James about 1760.
He was reimbursed for donations of corn and beef made to the Bedford County militia during the Revolutionary War.
Dudley died in April 1787 in Bedford County, VA and is probably buried on the plantation of his son James Gatewood. Sarah survived him and is mentioned in several law suits after his death.