I am currently a GTP but doing it in Science. I have a few friends who are doing it in PE and I would say that they only way you are going to get in is if you can offer another subject. There are just no jobs out there for PE teachers. One of my friends has had to teach Maths too and the other has had to teach Histor, both whilst in their training year. They will probably end up teaching History and Maths next year instead of PE. Another fellow Science teacher did his degree in Sports Science and because he knew there were no jobs out there he managed to persuade them to let him do a GTP in science. Sorry for the doom and gloom but there is no point training to find that there are no jobs out there afterwards!