At my college I'm on the G&T programme with 1A* 8A's and 2B's and I have access to HE+ (Cambridge scheme) because of it. At the other local college, you need 5A*'s to be on their G&T scheme because it's a bigger college, it just depends where you go.
My college asks for a points average of 6.7 (A*=8 points, A=7 etc down to G=1, add all up and divide by no. of GCSEs you took) and my friend just missed out with 7A's and 4B's as she had an average of 6.65- my average is 6.91