Hello Kunal,

Graduate Aptitude Test in Engineering (GATE) is a national-level post-graduate entrance exam that is jointly conducted by the seven IITs (Bombay, Delhi, Kanpur, Guwahati, Kharagpur, Madras and Roorkee) and the Indian Institute of Science (IISc), Bangalore for admission to M.Tech programmes offered by government as well as many private institutes.
GATE 2019 was organized by Indian Institute of Technology (IIT) Madras in online mode on February 2, 3, 9 and 10, 2019.

As for your question, top IITs and NITs will be very difficult but you might be able to get admission in lower ranked ones. You haven't mentioned your branch so I cannot point out the exact IITs or NITs you might get admission in.

For more information follow the below link:

Https://engineering.careers360.com/articles/psu-recruitment-through-gate

Https://engineering.careers360.com/articles/gate-cutoff-for-iits

Https://engineering.careers360.com/articles/gate-cutoff-for-nits