You know, I didn't know that was the GVWR of the Jeep. You know though, my max GVWR of the Caprice is 5380. I tow a trailer weight of about 4600lbs. That is only a difference of 4 passengers between the weight of the 19' gross Bambi and my '96 Caprice. Yet the car has a lower center of gravity, etc. When I tow, it's almost like it's one piece of steel. Very stable, very agile, very poor gas mileage!
It has zero issues at all towing. Braking, I could stop on a dime and get a nickles change. As far as emergancy manuvers, had a few in about 1200 miles of towing, especially in the larger cities. Cut off, etc. The car did as any car could with a good skill set behind the wheel.
Heck before the high power big frame pickup trucks, Airstreams used to be towed by regular sedans (of course they weighed a bit less perhaps).
At any rate, I for one always err on the side of saftey and you gotta go with your gut. My .02 simply say that you do not need a truck or a high power diesel to tow a 22' trailer, larger than 22', you bet!
As I said earlier, the wheel base of the GC does concern me a bit, but a 19', no problem. 22' I feel passable as long as you get the gear. Over 22', get another tow vehicle.