Hello aspirant,

It's quite difficult to predict that whether you will get  seat or not as  cut off marks/rank for medical colleges keeps changing every year.500 is a good score as you mentioned and you are from obc category it is difficult to get a seat in gmc but you can try...

For more information you can visit  NEET Rank Predictor

https://medicine.careers360.com/neet-rank-predictor?utm_source=qna&utm_medium=neet_rp

For more information you can visit  NEET College Predictor

https://medicine.careers360.com/neet-college-predictor?utm_source=qna&utm_medium=neet_cp

I hope this information helps you.

Good Luck!!