Keep in mind, you don't have to buy the gateway. As helene7t7 pointed out, it is not needed to work with HE. If for some reason it did not work properly, a firmware update might correct the problem. I had to do this back when I was on ST as the driver would not work unless the light strip was on the latest firmware. But, as I said before, it might be possible with HE, I just don't know. There is a topic for it, Support of OTA firmware updates for Z-Wave / Z-Wave Plus devices.
Sorry, that is for z-wave.