Hello saurav,

To pursue M.TECH in colleges of India , you can opt two ways-

1)  GATE Examination

2) Admission in private college

But by considering your CGPA , you are not eligible to give gate exam because their minimum eligibility criteria is 6.5 CGPA .

So ,in India private college seems to be an option for you.

Now In case of studying abroad there are certain criteria you need to fulfill:

1) An obligatory language test like IELTS ,TOEFL etc are required.

2) Most importantly an admission test that is GRE has to be given by the candidate .

GRE is a 340 marks test ,out of which 325+ scores are  considered very good scores.

After clearing GRE with good scores you need to select University then all the official formalities are required to fulfill.

Hope this helps and wish you all the best.