How much of the story in "Jersey Boys" is real?

Question: How much of the story in "Jersey Boys" is real!?

In particular, the part about one member incurring huge gambling debts, the part about the group volunteering to pay off those debts, and about Frankie losing his daughter!. And is the song "Fallen Angel" specifically written to honor his daughter!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

According to Wikipedia, one member did incur big gambling debts!. Wikipedia does not mention the other stuff!.Www@QuestionHome@Com