Born at Dublin Castle, Arran was the eldest son of Colonel the Hon.
[1] In 1820 Gore was sent as attaché to the British embassy in Stockholm, was transferred to Paris in 1825 and to Lisbon a year later.
[1] In 1828 he was promoted to secretary of legation in Buenos Aires[2] where he was chargé d'affaires 1832–34.
He succeeded his uncle Arthur as earl in 1837 and was made a Knight of the Order of St Patrick in 1841.
He died in June 1884, aged 82, and was succeeded in his titles by his eldest son Arthur.