Hi Prantosh, 

By comparing your gate marks for 2018 you will gate Idea about chances of admission. You have to fill application forum if you miss your marks from cutoff by 2-3 marks. There is still chance to get admission.
https://engineering.careers360.com/articles/gate-cutoff

I am sorry to inform you that you have very bleak chances of get NITs with your score based on the previous year cut off trend. But you can get some decent college. These are mere predictions and there can be changes in the actual cut off. Remain patient until the final cut off is  released by the authorities. Do not lose hope but may be you may get PSU with category rank.

You can check here previous year cut offs for various PSUs, check here by clicking the link-

Https://engineering.careers360.com/articles/what-are-gate-scores-for-psu-recruitment
Link: GATE College Predictor

I hope my answer would have enlightened you on your question.
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