Yes there are way to reduce the weight without going to the gym.
I have seen my brother has reduced his weight form 106 kg to 80 kg, without any gym.
Best way to reduce the weight is to consult your nutrition first and have proper diet plan. In this way you will be able to reduce you weight without having side effects.
Nutrition will give you proper plan for diet and some basic exercises. By following that you can reduce you weight.
It is not very easy to follow diet plan but you have to stay focus and motivated towards achievement to your desired goal.