It would be fine to put that in SVN. I've worked at places where large binary files got put in SVN. It generally wasn't a problem. The first copy ate up a bunch of space, but it was quite good at keeping the size of updates small. You have to be careful about how the updates are done though, to make sure it does a proper diff. If content is compressed, that doesn't work out nearly so well though.
Git stores files differently. I've heard it doesn't handle binary files all that well. In theory, the way it can pack multiple objects into a compressed archive, assuming a packed archive is possible, it should be able to get similar storage requirements, but I'm not sure if that happens in practice.
Fenrisul's models are probably not going to suffer ownership issues that would make it not suitable for GitHub. That's largely what I was getting at. Considering there are projects like FreeCiv, I can't imagine there would be any restriction on Fenrisul building and publishing his models. Assuming that Fenrisul is willing to publish them of course. I'm not sure how he feels on that topic.