If you went to G rated tires to take advantage of their added carrying capacity, you are not getting that at 80 psi...although you are likely better off than you were because of the more robust build of the tire.
For my money, I would air them to 110 to take full advantage of the increased load rating...which is the reason you did this in the first-place.
If your rims are rated for 110 psi you are good but will need metal hp valve stems.
Some will argue that you need to weigh all wheels and air them according to weight and psi charts.
Neither is wrong, but one is a lot easier than the other. Road forces are hard to predict, and I like all the extra capacity I can get. The argument against automatically going to 110 psi is that it increases the harshness of the ride...which is not an issue in my mind.