Hyundai Grand i10 LPG is a great car, but is low on power as it is powered by a 1.0-litre 66.08 bhp Kappa motor unlike the petrol variant which is powered by a 1.2-litre motor producing 81.83 bhp of power.
Yes you can get it installed. But we won't recommend it . Since, it will void warranty. CNG is best suited alternate fuel option instead of LPG. However, there are no CNG filling stations available in Faizabad UP. The nearest one is in Lucknow.
We would not recommend a CNG kit on Brio for it doesn't have a lot of low end torque in the first place and the kit makes it worse. On CNG, it will require a lot of throttle input to get it going in the first and second gear. Hence, we would not recommend you to get CNG kit fitted..