You can't just shoot and save these to your device, however, so it's either just goofing around with the 20+ Snapchatesque filters and AR lenses or nothing at all. That's unlike Snapchat, which lets you save your goofy Dancing Hot Dog memes and share around on whatever platform you feel like.
Facebook's GIF feature should be available to you already - to access it, simply swipe right on the home screen to access the built-in camera. Then, take a look at the top portion of the app, where you will see Normal, GIF, and Text modes. Go for GIF and express yourself.
In case you're not seeing the GIF option in the camera app, either patiently wait for it to hit your device or... don't – we were better off without it either way.