Hello aspirant,

As you have secured 500000 crl rank in jee mains from st Category, then it's impossible for toot to get any nits or iiits or gftis in all round of josaa round counseling.

Now, if you participate in csab special round counseling, then definitely there is a chance that you can get gftis with this much crl rank as per seeing the last year cutoff trends.

As per the last year cutoff trends, some gftis that you can get are :-
Assam university, Sant Longowal Institute of Engineering and Technology, Mizoram University, Aizawl, HNB Garhwal University Srinagar (Garhwal), Ghani Khan Choudhary Institute of Engineering and Technology, Malda, West Bengal.

And also check out the following link to know more about csab special round counselling and the previous year cutoff Trends ( note that all the mentioned ranks are CRL rank not category wise ranks ) :-

https://engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis

Also check out our jee mains college predictor tool to get an appropriate idea of colleges that you can get on basis of your jee mains rank :- https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Hope it helps!