can I get in semi government Quota in 500 marks at mp Shah college jamnagar?
First if all there is nothing like semi government quota seat, it is government quota seat.
Now since you have not mentioned your category so considering it as general.
So on such marks and category you have no chances of getting M P Shah Government Medical College, Jamnagar according to previous year's cut-off. As we go through previous year's (2019) cut-off then it shows that in 2019 the lowest cut-off marks was 585 for M P Shah Government Medical College, Jamnagar under state quota for General category and we saw an increase of around 25-30 marks in institutional cut-offs in 2020. So if you are targeting for NEET 2021 then your aim should not be less than 600 out of 720 marks .
You can check out previous year's cut-offs from the link given below :-
Note that the above prediction is made on the basis of previous year's cut-off and the cut-offs are bound to change every year depending upon various factors such as the number of candidates appearing in an examination, the number of candidates qualifying an examination, difficulty level of the paper, and so on.
As very few time is remaining for NEET 2021 so you can also solve the Test series for NEET 2021 for better finishing of your preparation, you can get the Test series from the link given below :-
I hope this information helps you.