Affiliations and Reputations only affect Circles rolls. You may have the reputation, but your actual skills dictate whether you can back it up. But yes, the GM could grant Advantage at his discretion.
LOL, I just posted the same question to the BW forum …LOL.
I often do this when appropriate and the roleplaying is there. As I mentioned in the other thread I guess this is just a “house rule” sort of thing. It doesn’t really change the game if it counts as your limit to one skill/one wise rule (it counts as a skill). Sure you could put it in as an advantage die but I think there are far more interesting ways to bring in the advantage die instead of just by nature of you being a badass.