PlaGMaDA focuses on maps, handouts and “manuscripts and drawings created to communicate a shared imaginative space”.
PlaGMaDa, in addition to be run by a very nice guy (Tim Hutchings is a total dude) that is answering to my nagging questions about the OSRCP and let me test Gallery to see if it’s fit, is also a huge repository for ready-made maps and house rules. Which is great in case you need some stuff for your game.
Anyway, yes, I’m most probably going to use Gallery to host OSRCP: there is just a couple of requirements I need to verify before starting to set up the infrastructure and to nag people to start uploading/licencing material. Unless you have better suggestions, of course (please comment).