This branch of the Gore family descends from Sir John Gore, Lord Mayor of London in 1624, younger son of Gerard Gore, whose elder son Sir Paul Gore, 1st Baronet, of Magharabeg was the ancestor of the Earls of Arran, the Barons Annaly and the Barons Harlech.
Gore-Langton married firstly Bridget, daughter of Joseph Langton (d. 1779), in 1783, and assumed the same year by Royal licence the additional surname and arms of Langton according to the will of his father-in-law.
Through this marriage Newton Park in Somerset came into the Gore family.
After Bridget's death in 1793 he married secondly Mary, daughter of John Browne.
His son from his first marriage, William Gore-Langton, was the father of William Gore-Langton and the grandfather of William Temple-Gore-Langton, 4th Earl Temple of Stowe while his son from his second marriage, Henry Gore-Langton, represented Bristol in Parliament.