G.D.N is a 2026 Indian Tamil-language biographical film based on the life of inventor and engineer G. D. Naidu. It was directed by Krishnakumar Ramakumar, who co-wrote the screenplay along with R. Madhavan. Madhavan produced the film under his Tricolour Films production company in association with Varghese Moolan Pictures. It stars Madhavan in the titular role as Naidu, with Sathyaraj, Jayaram, Priyamani, Dushara Vijayan, and Vinay Rai in supporting roles. The film was released on 7 August 2026, received mixed reviews from critics and became a box office failure.

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