Never heard of GX. I have plain Opera 68, and WebGL games work fine for me. What operating system are you on? Are your drivers up to date?
I'm on windows and I'm pretty sure my drivers are up to date but I'll check if they are.
(GX is the "gaming" version of opera so I don't think it 's much different than the regular version )
(edit)never mind webGL decided to start working again
