Hello dear ,

No there is no chance that you can get a government medical seat with 300 marks eventhough you belong to  Gujarath obc quota . With your marks your predicted rank is in between the range of 369872bto 4440022. But this is based on previous year analysis so there might be changes.

You can visit the link given below to know about the colleges that you will get with your predicted rank

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

All the best for your future.