If it were added to the image component, webp would be a much better choice.
You can already import a stitched image, or you can load in individual frames of a gif, then simply play through them using a timer (use the panel component for this).
If you don't need to have other components on top of the gif, you can also use a WebView (no other HISE component can be rendered on top of the webview), and then you can import gifs, webp (way better) etc.