Rack rates for these rooms are publicly available, even if they are never/rarely available for cash bookings.
Pre-tax rack rates are $2811-3358 during November 2020.
To verify yourself, you can go to Bay Lake Tower's page in WDW's website (I can't link to it for some reason) in a Private Browsing/Incognito Mode window and view rack rates for the 3BR GV TPV by clicking "View Rate Calendar".