M.S admissions help

Question

My GATE score is 622 and rank is 1797. (CSE).My B.Tech DGPA was 8.32 and percentage 75.7. Is it good enough for M.S admissions? What should i prepare for interviews for the same? What will be the benefit of doing M.S from IIT/NIT? Will it hurt my career options?

I need help in deciding which institutes I should apply for using my GATE score. I wanted to do M.Tech but this is not an option in IITs or NITs(Top). Looking for suggestions where I can apply.

I will give ISI CMI BITS pilani entrance and IIIT-H. Please give me more suggestions. What about cross departmental branches in IIT/NIT?