Sometimes, the words are not enough to send messages. That's when you turn to emoji, stickers and (in extreme cases) GIF. It is becoming easier to create GIF with the latest beta update of Gboard. All you need to do is open the GIF section, and you can make your own custom GIF with the camera.
This feature is not coming out of nowhere: the creation of GIF has appeared in a couple of APK Disframes. Now, it has arrived, and it works as we expected. You can open the GIF interface on the keyboard, then make sure you are on the "My GIF" tab to create one. Gboard requests permission from the camera when the creation process begins the first time. You get a full-screen camera interface when you do your GIF, which lasts about three seconds. Google also has some extravagant filters to add to the video. GIFs are saved in the My GIF tab for later reuse as well.
This function may be limited to currently selected devices: I've seen it appear on a Pixel (and that's what our informant used), but it does not appear on a Galaxy S9 at this time.
Google has also added a new gallery of stickers to Gboard, and it looks a lot like Allo's. He even has the blobmoji. With Allo effectively dead, Google had to do something with all those stickers. You can browse the selection and add the ones you like to Gboard.
In addition, the current Gboard compilation has support for KitKat and earlier versions. There may be other later builds that support older versions of Android, but Google may also be finalizing Gboard updates for these versions. If you want to verify the update on your phone, you are on APK Mirror.