The language in your post suggests that you're in the USA. You've posted on a UK site, where the structure of gymnastics 'levels' may well be different to those in your home country. (i.e. even if there are any experts in gymnastics around here, your post might not make complete sense to them). You might get a better response on a US Q&A website, such as one of these:
http://answers.yahoo.com/
and/or
http://www.answerbag.com/
As I'm sure you're aware, most people who make it to the highest international levels in gymnastics are already learning before starting school and are actively competing only a year or two later, so you
might find that it's too late to progress to the highest standards. However there are always a few exceptions in any sport. In my teaching days I met several young people who were destined for national and international success in various sports. Real talent is usually easily spotted. Ask your coach(es) just how high they think you can go if you put in maximum effort. They will probably be more able to give you an accurate answer than anyone on a Q&A website can.
Remember though that sport should be mainly about
enjoyment. If you ever find that the fun has gone out of it, it's time to give it up!