Lokugamage Gayantha Ganadesha Karunatileka, MP (born 21 August 1962) is a Sri Lankan politician. He is the current Chief Opposition Whip of the Parliament of Sri Lanka. He formerly served as a Cabinet Minister of Lands and Parliament affairs and Chief Government Whip. A former member of the United National Party (UNP), he served as the UNP Media Secretary and acted as the cabinet spokesman of the government.
He was educated at Royal College Colombo. He is the nephew of Rupa Karunathilake.