There are three or four threads on this already. But I don’t think anyone has made a device type handler for it yet, as it is just starting to come on the market.
As you noted, that is indeed the manufacturer site. They just made it available for sale there a couple of days ago. It should start showing up in other sales channels in the next couple of weeks.
The manufacturer is Jasco, but they have licensed the GE name and all of the GE brand Z wave devices are made by them.