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Lemmy can subscribe to a.gup.pe groups?
(lemmy.ml)
A community dedicated to fediverse news and discussion.
Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
And as a further FYI, !fediversenews@venera.social, which is a friendica group (works the same way as a gup.pe group) had a huge amount of content already showing in lemmy when I looked, which suggests it's federating well