I was wondering about this: what would Gandalf have doen if he still had been with Frodo when they came to Mordor? What way would he have chosen to get to Mount Doom?
Faramir says that Gandalf would not have taken the road along Cirith Ungol, and Gandalf himself is shocked when he hears Frodo is going that way. But apart from that and the Black gate there are no other roads into Mordor. It is never said that Gandalf has any idea of where they should go, but I don't believe he had not thought about it. He must have had some idea what to do.
Faramir says that Gandalf would not have taken the road along Cirith Ungol, and Gandalf himself is shocked when he hears Frodo is going that way. But apart from that and the Black gate there are no other roads into Mordor. It is never said that Gandalf has any idea of where they should go, but I don't believe he had not thought about it. He must have had some idea what to do.

