Hello Parmar,

The cutoff varies every year depending upon various factors like availibility of seats,difficulty level of GATE etc.

So keeping these things and the previous year cutoff trends, I would say  try to get 25+ fror qualifying.

Try to keep a score of 650+ if you are considering out of 1000.

I will suggest you to visit the link below to gain a deeper insight into cutoff of IIT regarding GATE and your branch.

Here's the link for the same:https://engineering.careers360.com/articles/gate-cutoff-for-iit-kharagpur

Hope this helps and all the very best to you!