Karthick you can check the last year cut-off of every individual branch available to do M.Tech in every IIT and NIT in the links given below. This will help you in estimating the possible branches in possible IITs and NITs so that you can apply in the specific college within the application deadline.

• You can check the list of IITs which you can expect at your GATE score from the link given below: https://engineering.careers360.com/articles/gate-cutoff-for-iits
• You can check the list of NITs which you can expect at your GATE score from the link given below: https://engineering.careers360.com/articles/gate-cutoff-for-nits

Feel free to ask if you have any more queries. All the best!!

you can get call from interdisciplinary(like geoinformatics, T&D{IIT Bombay}) branches but it's hard to get call from core branch.