FediTips has moved!You can either attach the GIF file, as you suggest, or you can copy a link to a GIF from a service that hosts GIFS elsewhere. Links to GIFs are automatically embedded in the post, though depending on the viewer's settings it may not play automatically.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.