Hi! Rishabh, 

People under 1000 rank in gate 2019 can be divided into three categories :

People whose rank lies between 500-1000 can explore their career opportunities in new IITs, top NITs  and top state level colleges. While people under 100-500 can explore their careers opportunities in old IITs, IIScs, NITIEs  and people under 100 rank can explore their career opportunities in some PSUs. 

Good luck....