Hello aspirant, 

As you mentioned you belong to uttar pradesh which means you have to apply via all India quota counselling. 

So you need to score a minimum of 540 marks to get into guwahati medical college, assam via all India quota.

Talking about the ranking, this is an estimate based on last year's rankings and can vary. So you need to rank within 8000-10,000 to get in there.

Hope it helps 

Thank you