If you already know how to mod you Cod6 Gt then your in luck because it is as simple as signing in both your main account and your modded profile on separate controllers this allows both profiles to view friends, join parties, and play any coop online game with both those accounts.

1. Sign in on your modded gamertag with the controller you want to play with (player1)

2. Change the max party size to 1

3. Sign in your main account on another controller or player 2

4. Join your friends games and boast.

Do not make the gt offensive or you will run the risk of getting perma banned.