If I don't pass my GCSE would I be able to get in college?
Simple. Start looking into possible nearby Community Colleges and ask them about their GED programs. The admission requirements for community colleges are far less restrictive then regular 4 year colleges.
Many community colleges allow their students go fro GED and start basic college classes at the same time. If you serious about trying and making an effort and working really hard at your college work, taking these two years at community college, you can transfer to a four year college with a solid background of classes and possibly an Associates degree. At that point, for many four year colleges your dreaded high school past will be ignored. In fact making significant improvement at a community college from your high school years will look good on your part when you get to the four year college.