I am aware of the GTC “concept,” but not how it works. I was sufficiently curious about this game after browsing its forums that I signed-up for a free trial.
The way the training and what not works is very different from any other game I have played. It really changes how you interact. It is also a ver guild heavy game. You have to get in one and interact if you want to get into some of the later game content. It is also something that basically makes the sky the limit for ‘end game’ because the length of time it takes for longer duration training.