ActivityPub support for GNU Social is in the works! I'll be working with @up201705417 on a plugin this summer.
https://git.gnu.io/dansup/ActivityPub/blob/dev/actions/activitypubactor.php
Bobinas P4G is a social network. It runs on GNU social, version 2.0.1-beta0, available under the GNU Affero General Public License.
All Bobinas P4G content and data are available under the Creative Commons Attribution 3.0 license.