For the final answer. Its shame that the four of five months old ROG STRIX GL502 is not supported for ROG XG Station 2. Its shame because my money could be spend on that.
If it is possible, to somehow add a firmware update which will support THUNDERBOLST 3, just do it. My money will be yours, and both of us will be most happy.
It may sound selfish, well i am dissapointed.