The official trailer for the biographical period drama “GDN” is released, featuring actor R. Madhavan as inventor G.D. Naidu. Across reports, the trailer is described as a short preview—nearly three minutes—that introduces Naidu’s life and frames his story around perseverance and determination in the pre-independence era. The film is directed by Krishnakumar Ramakumar, and both sources describe it as a “thrilling” and “inspiring” depiction of Naidu’s motivations and impact. The cast information highlighted includes performances by Sathyaraj and Priyamani alongside Madhavan. One report also notes that Madhavan is involved beyond acting, serving as a co-screenwriter for the film. Overall coverage focuses on the release of the trailer and the emphasis it places on Naidu’s character and the historical setting, without detailing additional plot developments or release dates in the provided excerpts.