The makers of the highly anticipated biopic “GDN,” based on the life of renowned industrialist and inventor GD Naidu, have successfully wrapped up a 45-day production schedule in Coimbatore. R Madhavan, who stars in the titular role as the “Edison of India,” is also producing the film alongside his spouse Sarita under their Tricolour Films banner.Celebrating the milestone, the cast and crew shared a spirited video showcasing their enthusiasm for completing the schedule efficiently.