Libreboot will soon apply to re-join the GNU project. It is not yet certain
whether the GNU project would indeed accept Libreboot as a renewed member.
RMS of GNU and John Sullivan of the FSF have both accepted my apologies, via
private emails. With that, plus consent from Libreboot core maintainers and
acceptance by the community, an attempt at re-joining the GNU project is now
in progress.
You can keep up to date with further news, on the Libreboot News section on
the website:
https://libreboot.org/news/