The 2004 cult classic 7G Rainbow Colony was not officially dubbed in Hindi. Instead, it was remade in Bollywood as the movie (2019), starring Meezan Jafri and Sharmin Segal.
As for the Hindi dubbed version, you can try searching for it on: 7g Rainbow Colony Movie Download Hindi Dubbed -
Hindi Dubbed Version
Q: What is the runtime of 7G Rainbow Colony? A: The movie's runtime is approximately 125 minutes. The 2004 cult classic 7G Rainbow Colony was