I found the brochure for your coach
http://www.gulfstreamcoach.com/litar...Voyagerweb.pdf
Towing capacity depends on model. Smaller models have higher towing capacity since they weigh less to start with.
Model 8329 and 8335 have the W20 Workhouse Chassis with GVWR of 20,700 lbs. All other standard models have the W22 Workhouse Chassis with GVWR of 22,000 lbs.
GVWR is the maximum weight of the MH itself. I call it the weight 'on the springs'. Most GS coaches weigh about 2000-1600 lbs less than GVWR when empty. The only way to know this number is to have you MH weighed on a commercial scale. If you will be towing such a heavy toad, I would strongly suggest you do this!
Now the fun part. The GCVW of all these Workshorse chassis' from this era is 26,000 lbs. That means the combined weight of your fully loaded MH + toad is 26,000 lbs.
With a W22 chassis, your options are limited. A full-size truck toad filled with gas weighs around 5500 lbs. You will only be able to tow a 5500 lb vehicle with a near empty MH. Even so, you would have to upgrade the hitch to a 6000 lb version. This is not really a viable option because the dry weight of the coach is just too high.
With a [i]smaller[/] W20 chassis, your have some hope. If your don't fully load your MH and keep the GVWR 'weight on the springs' to under 20,500 lbs, then you can tow a 5500 lb vehicle. One again you will have to add a 6000 lb hitch.
Practically speaking, only the newer Workhorse W24 chassis with GVWR of 24,000 lbs and GCVW of 30,000 lbs is suitable for towing trucks.
BTW: GVWR/GCVW is set by the chassis manufacturer. The MH manufacturer cannot change these limits. They can only improve things by building lighter MH's and adding stronger hitches where it makes sense. GS is about the same as everyone else in this regard.
Sorry to break the potentially bad news to you.