Without specifics I.E. : how much the trailer weighs empty (my 20ft Featherlite only weighs 1475 lbs empty) or what car you will be hauling, I can only give general information.
Beef up the rear suspension of the GP with heavier springs, coil over shocks or even air shocks & as long as the trailer has brakes & the GP has a brake controller, you should be fine.
You will get a bunch of "Nay Sayers" bashing you , but in the end it comes down to what you are comfortable doing. Those that frown upon things that were just fine in the past are probably complaining from their safe spaces! Remember in the old days, this was a common occurrence Take a look at 60's & 70's pictures from drag strips, the tow vehicles were for the most part NOT Dually's or even pickups
God Bless
Bill
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