What is GB2?

[illusionist]

Hello. I had bought GB1 3 session version, i stopped working on it when i stopped wow for a while and now i came back and i found a hole profiles and comments about GB2.
I don't know what is that and what difference has from GB1 also i don't know if i can update my GB1 to GB2 or i have to stay on GB1 and buy GB2.
More info more help to me. Thanks

 

[Tony]

Gb2 is an advanced Gb1 and you can use it via Hb

if you have a Lifetime key/Hb you can use it,if not you have to buy an Hb key