The bed/lounge is not at all comfortable. We tried a 2Ē foam pad and that was not enough so we are now using a 3 inch foam pad which works best. It is very bulky so we roll it and it is covered with a pillowcase style bedsheet. There is no need then for making the bed with bedsheets. Just pull out pillows and comforters.
While it is inconvenient to unroll this foam pad every night and again roll it in the morning, it is worth the trouble for comfortable sleeping.
We made a rack where the rolled pad sits out of our way while traveling or when we use the area as a lounge.
Good luck with your GT.