Hello,

Yes you can give GATE. There is not attempt barrier or age barrier in GATE. The only criteria is candidate should be in the final year or graduated from a recognized college.

You can prepare well as per your branch and attempt the exam with best efforts such that you will be eligible to get an admission in TOP  engineering colleges.

to take an admission in IIT or NIT, a cgpa more than 6.5 is required.

Hope it helps!