First of all, congrats for all stuff GSAP! This is a wonderful piece of work!
Secondly, I've encountered issues with Draggable, while using React 16.5:
Using Draggable.create(target) doesn't allow the user to drag the element at all. A 3d transform is set on the element, having all 0px values, but the element itself doesn't move.
The onDrag / onDragEnd / onDragStart handlers aren't called. On the other hand, the onPress handler is called, but two times every click, once with a PointerEvent type event payload, and with a MouseEvent, the second time.
Also, it's important to poin