I think that new maintainers like Felipe need to ask for an account
here:
https://wiki.gnome.org/MaintainersCorner
As long as the project meets the prerequisites:
https://wiki.gnome.org/Projects/Prerequisites
There are many projects hosted on gnome.org which are not officially
part of GNOME. A bittorrent GTK+ client is definitely the kind of
project that makes sense to host on gnome.org.
But GNOME has two categories: core and apps. For example for the latest
release:
core - https://download.gnome.org/core/3.27/3.27.3/NEWS
apps - https://download.gnome.org/apps/3.27/3.27.3/NEWS
A bittorrent client could be part of apps, no? In that category there
are games, an IRC client, developer tools, even a hex editor and
gnome-multi-writer (some niche applications), so why not a bittorrent
client? The boundary seems arbitrary.