I've tested with GX2 and GX4, they both do not work.
On the other hand, I'm in S.Cali and their T-Mo stores had the linksys routers for $50 and $50 mail-in-rebate IF you have signed up for the Hotspot feature. So if you did, it's basically a free router.
I just grabbed it and parked it at work. Oh well, so much for GX2 and 4 not working.