SG: Ask her to prove to you that the GB are from God ... by what authority, by what proof beyond a claim can they say that they are representatives for God any more than the Catholic College of Cardinals, Pope, or the Mormon 12 Apostles ... all claims to be of God, God's church, God's true latter day prophet (Really "profits" is a better term).
Then, if she can't, get her to agree to get away from all religion as fast as you can ... and stop dabbling in ancient tribal beliefs and superstitions of our ignorant ancestors ... and start living modern life in the 21st century ... if God has a plan, he should be competant enough to reveal it in a way that is clear and factual ... and not this muddy method that has done little more than confuse, obfuscate, and cause wars.