Gontikas was born in the village of Magouliana in Arcadia.
After studying law at the University of Athens, he spent many years as a lawyer in Pyrgos until 1936, when he was as MP for Elis Prefecture with the Liberal Party ticket.
He was Supply Minister under Themistoklis Sophoulis (18 November 1948 – 20 January 1949)[1] and Sophoklis Venizelos (23 March – 15 April 1950),[2] and briefly (15–19 April 1950) Minister without Portfolio in the Nikolaos Plastiras cabinet.
Gontikas was also chairman of the Greek–American Institute of Athens and of the Greek–Yugoslav Union.
Dimitrios Gontikas was married and had two sons: Kostis, a member of parliament, and Ilias.