While I'm waiting for a print version of the GPC I've the possibility of picking up a copy of The Boy King. Could someone be so kind as to explain the main differences between the two campaigns. I have the 4th edition rulebook if that makes any difference. Thanks in advance.

The GPC is an extension and partl rewrite, with lots of new adventures, of Boy King. GPC starts earlier, and goes on beyond Camlann, so it is the whole of Arthurs live, from before conception till after his "death". And it is based on 5th edition rules, but it should not be a problem to play it with 4th edition.