Do you mean Marianne, his most recent former wife? What were those revelations?
Among other things she says Gingrich asked his second and third wives to marry him before he told the previous wife he wanted a divorce, including the one that was in the hospital at the time. He managed to finagle an annulment from his second marriage so he could marry Marianne who is a Catholic. There were lots of other things, but I suggest you Google Marianne Gingrich. I think she is coming out with a book.
Actually, I was mistaken, Marianne is the one he got an annulment from after many years together. At any rate, read the link in my comment #37 for all the details. It is 8 pages long but very informative.