kapitoshka
А толковый словарь английского языка вам не подойдет?
Definition of godfather in English:
noun
1A male godparent:
he is godfather to her son

Definition of godparent in English:
noun
A person who presents a child at baptism and promises to take responsibility for their religious education.

Там есть, конечно, еще и godfather как a person directing a criminal organization, especially a leader of the American Mafia и a man who is influential or pioneering in a movement or organization, но сомневаюсь, что это вы привяжете к контексту ГП.