Gladiator flat tow

Someone here might know, see what they say but this is a Jeep TJ focused forum 1997-2006. Good luck
 
The Roadmaster Invisibrake brake system is usually rated as one of the best. I guess it would depend on how much you are towing and what you are towing with. I have used a Brake Buddy system on my Jeep. It basically keeps me legal. It is not the best at actually giving much supplemental braking.
As stated you may get some real world reviews in Gladiator forum but many people here have built their rigs, work on them and have extensive knowledge of Jeeps in general. Here is a thread discussing flat tow systems that has a lot of relevant information.
https://wranglertjforum.com/threads/flat-towing-braking-systems-your-recommendations-and-why.41511/
 
I use a BlueOx BRK2019 to tow my LJ. Roadmaster and Hopkins make units with similar technology. These units connect to your brake pedal. NSA RV make a device that fits in your drawbar and uses cables activate the brake pedal.