Gilberto "Bibit" Muñoz Duavit, Sr. (November 29, 1934 – December 14, 2018) was a Filipino lawyer, entrepreneur and politician.
He along with accountant Menardo Jimenez and lawyer Felipe Gozon acquired the Republic Broadcasting System (RBS) from Robert Stewart in 1974 and renamed as GMA Radio-Television Arts.
Duavit sat as chairman and chief executive officer of Group Management and Development, Inc., as well as chairman of Guronasyon Foundation, Inc., an organization which recognizes remarkable teachers in the province of Rizal.
He was also chair or director of various firms and companies, among them Permastress Industries, Inc., Unistress Concrete Systems, Inc., Sagittarius Condominium Corporation, and Mar Fishing Company, Inc. Duavit was a former assistant executive secretary for social, political, legal, and economic affairs (1966–1970) and acting executive secretary, Office of the President (1969), and was twice awarded the Presidential Merit Award in 1967 and 1968.
He had likewise served as a member of various House Committees including Constitutional Amendments, Education and Culture, Housing and Urban Development, Public Works and Highways, and Banks and Financial Intermediaries.