I have made it to the next day thanks to everyone's help. I had to leave the room though when that girl was climbing all over Gabriel (made me blush).
Here's what I did just in case someone else is ever stuck here. It might prove helpful.
Going back to Wagner museum and the lake did nothing. I went back to Ludwig's museum and reread everything aloud. I saw nothing new but I got extra points anyway and Grace got excited about a letter to the Conductor that I had already seen.
Went back to Ludwig's castle and saw some paintings that I missed and got another point.
Back at Schloss castle Gerde still won't talk to me. I went back to the Wagner museum and got a conversation about the conductor's letter with Georg.
Back at Schloss Gerde still won't talk to me, grrrr. At the post office she says no packages for Grace.
Up in the library sitting the desk I discover something new. I had been trying to look at Grace's notebook in inventory. I accidentily clicked on the bottom icon and her notebook opens up. I read the whole thing. When I closed it I had the fax in inventory. Weird. I gained 14 points.
I read the fax and headed to Georg. Good boy Georg
End of chapter, yayyyyy!