Hey,

If we look at the opening and closing scores of previous year Gate admissions, you might get a seat in one of the old IITs for chemical engineering  as they have scores in 500+ and you have that.

IIT Delhi and IIT Kharagpur had a closing score less than yours in the previous year but it depends what is the admission cutoff for these colleges this year.

you can viist the link below to check out the previous cutoff scores of colleges:

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

To get a probable idea as to which college you might get you can visit the link below:

I hope this helps.

All the best!