If you want to take admission in Government Medical Colleges then you have to go through the NEET counselling process. So nope! one can't take admission to government medical colleges before the NEET. Even one can't take admission in any medical colleges until and unless they have a NEET valid score. So don't worry about it and keep on preparing.

To know about the seat allotment process or about reservation regarding to your admission then visit the link below:

https://medicine.careers360.com/articles/neet-seat-allotment

For NEET revision strategy visit the link below:

https://medicine.careers360.com/articles/revision-strategy-for-neet

I hope this answer helps. All the very best for your future endeavors!