After finding out about his heritage, George swore that he will climb the ranks, get close to Alpha Edward, and challenge him to an official duel where he will kill him.
For a decade George studied and trained like his life depended on it.
The desire for revenge fueled him to work harder and longer than everyone else, and his Alpha genes helped him to come on top.
As his wolf started stirring, George learned to subdue his aura and not disclose that he is an Alpha. He showed just enough for everyone to know that he was strong, but not too strong because he didn't want Alpha Edward to see him as a threat.