Biopics demand blood and marrow. Krishnakumar Ramakumar's GDN settles mostly for a catalog of achievements. R Madhavan steps into the skin of Gopalswamy Doraiswamy Naidu—hailed as the 'Edison of India'—with unmistakable relish, having co-written the screenplay and co-produced the feature. Madhavan shoulders the production with grit and vintage charm. Yet the film races through historical bullet points so fast that the man behind the machinery remains an enigma.
The story opens late in Naidu’s life during the late 1950s. Income Tax Department officers Ambalapara Krishnan (Jayaram) and Kili (Karunakaran) descend on a stripped-down hut occupied by Naidu and Ramiah Pillai (Sathyaraj). Their demand is ruthless: hand over 80 percent of his wealth and property. From there, Ramakumar hits rewind, dropping us into 1920. Naidu is waiting tables just to buy a British officer's motorcycle, even as his wife Chellama and their young child wait at home. Ambition gnaws at him. Soon, the cotton mill worker buys out the mill, sets up the Universal Motor Service, constructs a house inside 24 hours, engineers an indigenous motor, builds a five-valve radio, and secures a contract with Mercedes Benz after a brush with Adolf Hitler.
The core friction belongs to Naidu’s war of attrition with Income Tax Commissioner Adams (Carl Andrew Harte). Adams despises Naidu’s meteoric rise and community sway, launching a vendetta to break the inventor financially. Jayaram brings sharp bite to the tax bureaucracy, while Sathyaraj plays Pillai with steady, unforced warmth. But Adams remains a paper villain—a spiteful bureaucrat drawn in broad, flat strokes.
The screenplay fumbles its dramatic stakes by treating personal tragedy like a chore. When Naidu loses his prized cotton mill and his fortunes collapse through bad investments, he winds up in deep penury alongside his second wife, Ranganayaki (Dushara Vijayan). We see the empty pockets. What we do not see is the bruising psychological fallout. And when his first marriage to Chellama disintegrates under the weight of his obsession, the film glances at the fracture and walks away. Chellama simply disappears from the narrative without a word.
The women in Naidu’s orbit fare worst of all. Priyamani, Dushara Vijayan, and Aditi Balan show up for brief scenes, handed barely enough dialogue to register before the camera pivots back to the patents. It leaves the ensemble feeling distinctly hollowed out.
Only in its late stretches does the film showcase Naidu's cunning intellect rather than his resume. Tasked by taxmen to surrender 52 title deeds representing 80 percent of his holdings, Naidu coolly tables just two—pulling off a tactical loophole that reminds you why this man outfoxed empires. The period work is persuasive, capturing the physical textures of early-twentieth-century industrial Madras Presidency with clean craft. As history, GDN honors an ignored pioneer; as drama, it leaves its leading man doing all the heavy lifting alone.