I've weighed my 350TS multiple times. When just starting out on a 2 week boondocking trip where I was heavily packed with full water, the motorhome weighed in at 21,060 lbs. My Ford Edge towed weighed 4560lbs. I was barely under my GVWR at 25,620lbs. Scale sheet attached.
It handled it well only slowing down on the hard pulls in the mountains above 4000ft but it does that when I'm lighter also. I'm pretty sure I could not possibly load up more stuff than I did on that trip so I'm not worried about overloading.
BTW, the 2009 literature list cargo capacity at 1720lbs.
2009 Georgetown 350TS (bunks)
400W solar, 440AH 6V GC2
2009 Ford Edge AWD Ltd towed
2011 Honda Fit Sport towed