The official trailer for “GDN,” a biographical period drama about engineering pioneer G.D. Naidu, is released in Coimbatore at the Kari Motor Speedway motorsports circuit. Multiple reports describe the event as featuring the trailer launch amid vintage cars. The nearly three-minute preview highlights Naidu’s story, presenting him as a visionary inventor and focusing on themes of resilience and determination in the pre-independence era. R. Madhavan portrays G.D. Naidu, and he is also reported to have contributed as a co-screenwriter. The film is directed by Krishnakumar Ramakumar. Other cast members reported across outlets include Sathyaraj and Priyamani, alongside Madhavan. Together, the coverage characterizes the film as a period drama shaped around Naidu’s motivating journey and engineering legacy, with the trailer serving as the first public glimpse of the film’s narrative and performances. The accounts do not report additional plot specifics beyond the trailer’s thematic emphasis.