Gigs watch (Canadian) is exactly the same as Chinese "(Hopu) EC308" you may find in Aliexpress for as low as USD 213 (free shipping and no tax / custom). Gigs probably buy the EC308 in bulk from China to resell. I cannot find any technical support from Gigs or from China with firmware download.
Vapirious AX2 has the same hardware but it has a different laucher ("Windows 8" like). I also cannot find any support page with firmware download (www.watchmobilephone.com
I watched videos and read one review (in Italian) on the AX2. It appears to have Google Play store. I also watched two short videos on the EC308, but I did not see any Google Play store. I read that even with Play store, many apps do not work (or work properly) in these smart watches because of the extremely low screen resolution.
If there is no Play store, it may be possible to sideload and install Android apps manually using ADB (enable "USB Debug"). I read that you can certainly do this with the Sony SmartWatch. You may need to find the USB driver for the watch in order to do this.