Hey aspirant, congratulations on clearing GATE 2019.

You have managed to get quite a considerable score out of thousand in GATE 2019 but this score is not good enough to get you into some good and old IITs.

Usually, old IIT requires an OBC candidate to have a score of above 600 out of thousand to take admission.

You can look for new IITs like IIT, Mandi and Dharwad as you may have some chances there.

You can look for the previous year cut offs of other IITs and NITs on the link below:

https://engineering.careers360.com/articles/gate-cutoff

Hope you will understand.

Goodluck.