The new icon appears to be in testing mode, being only available to a few select users. It's not yet clear if Twitter has partnered with a GIF search engine to help populate its library, as Tinder ...

How to create your own WhatsApp GIFs If you can't find the right GIF to suit your needs, you can create your own. Just tap the paperclip icon in the top-right, then choose Gallery. Next, choose a ...