A couple of years ago SGUL cut GEM places by 50%, Imperial changed their GEM from 4 years to a 5 year course and Leicester have announced 2015 is the final intake for their GEM.
In addition there are moves to change the point of registration to the end of degree, in contrast with the end of FY1 as it stands now. This will result in 4 year courses be one non-compliant with regulations.
Finally discussions have begun concerning the removal of the foundation years altogether, which will only reinforce the above point.
All of this points to a big change in the medical education system, with a push to make the profession more accessible to overseas medical graduates. Whether or not this results in the end of GEM is uncertain, it will however mean a significant change in GEM if these actions come to pass. Given the actions of some medical schools, as above, it seems they aren't confident it will remain.