hello,

congrats for your gate score. as this is ctoff is really high it is really difficult to get psu as you mentioned your rank. do apply in npcil, ecil , bel. some psus will conduct there own entrance. 

so study well and prepare for the best.

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

for further details have a look at the above mention link address.