I apologize for just responding to your question. No, the rooms/hotel does not have in room tubs or jet tubs.
Not in the room we had.
No, not to my knowledge
there are some suites that I have stayed in that have the Jacuzzi tubs with jets, but I am not 100% about this hotel. I would suggest a call to the hotel.
I was stayed in a regular king size room in July 2016, teeney bathroom with just a shower stall.
Get an answer from Hilton Garden Inn Fredericksburg staff and past guests.