Q:
Character name "G T O" is inappropriate?
Probably ‘inappropriate’ for trademark purposes:
EULA says:
You may not select an Account ID, Account Display Name, NCSOFT Message Board ID, Character ID and/or Team designation that would require any license from any third-party;
GTO is still a trademarked name of GM. (Xerox..although a trade name has become a generic term for making a copy of something, it might be allowed, it might not…hmmm a team of mesmers anyone?)