I think the title is unintentionally misleading some of the commenters here because of ambiguous wording. My understanding is that it should be read as "French judge rules GPL license to be (inapplicable in French copyright court)" rather than "French judge rules GPL license to be inapplicable (in French copyright court)". I.e. the license does not apply within the bounds of copyright court - rather than a broader ruling of inapplicability issued from a copyright court. I may be wrong though, this is just how I interpreted the article.