[grothoff]

You are wrong on many details here. First of all, GNU isn't even a legal entity. The only legal entity is the FSF. Second, only some GNU packages have a copyright assignment to the FSF, not all. Some packages use a DCO, and some have way more creative solutions (see https://www.gnunet.org/static/pdf/copyright.pdf for example). Finally, not all GNU packages are necessarily GPL-x-or-later. Yes, that's generally a good default (and sometimes AGPL-or-later or LGPL-or-later are good, too), but not a strict rule.