Any university that accepts a student based on their GCSE results would be extremely shallow. It's not difficult to attain 10a*s at gcse if you have a decent tutor and know where to get a* revision material, (I got C/Bs and 2as in my mocks, and I revised 2 weeks before each exam and easily clocked 6a*s 2as 2bs). In fact over 6000 students every year get at least 10a*s across the UK. Universities know that its ridiculously easy to achieve those grades, what they really look for is strong as results, nothing less than AAA(A/B), especially since competition is insane, and predictions that are at least AAA, if applying to oxbridge than they want an A*A*A* prediction. They also want a high Ukcat or Bmat score, these are very important as they are designed to assess the "inner doctor" within each applicant. Gcses don't mean anything rather they are used as a tiebreaker. A good personal statement is also very important. I know someone with no a*s, he got 8as 3bs, he got 800ukcat, AAAB at a level and he got into southhampton, he also had a lot of experience and volunteering stuff.
So the answer is YES!, you have a chance, get a top UKCAT score and at least AAA at A2, but aim for 3a*s. If you don't get in this year then apply the next year, that is fine as long as you dont do your a levels over 2 years.