My libgda package says that http://www.gnome-db.org is its home page, as does Wikipedia (and how could that be wrong!) and also DuckDuckGo.
When I try to follow that link, I end up at https://static.gnome.org/error-500/500.html, which has an interesting link in it saying that ways of reporting the issue are to found at https://wiki.gnome.org/Sysadmin/Contact. But when I click on that I end up back at the same page - a merry little dance! (The status page says "All systems go", BTW.)