Hey Prasoon.

See the GATE marks are valid for two years tenure so u can use ur 2018 marks to avail any kind of admission this year in the colleges for ur higher studies.

But since the paper this year was of low standard the cut off marks for the admission in the colleges might increase. The marks u have scored is enough for u to get qualified but might not be sufficient for u to get admissioned in the good colleges like NITs and IITs.

Hope u got my point. Ask if u are having any query.

Good luck