Dan,
I've heard you mention in the past (my apologies if it was this thread!) that while you enjoyed your Jeep, after months you wished you would've have something with slightly more interior space like a sportsmobile.
Looking at the footprint of the Gladiator, do you think a camper buildout on that truck would add enough room to satisfy your interior room wants?
Those sportsmobiles appear to be very capable but the Gladiator seems like it will be slightly more off-road-able and might have a slight edge maneuvering around cities.
I think it depends more on the weather for a proposed trip, the length of said trip, the number of people involved, and how remote you are attempting to get.
These are the factors that determine how suitable a vehicle/camper combo is.
The gladiator "camper" is going to be interesting too, because the rear of the bed will still have a vertical wall, and the rear of the tub vertical wall will still be there... so it's not going to like a Sportsmobile where you can just waltz on through. Also I doubt there will be a nice way to swivel the front passenger seat which is a super nice feature of vans.
My Jeep right now has over 5 feet of length from the inside of the tailgate to the back of the driver's seat... which is longer than the 5 ft Gladiator bed.
So in all honesty it's apples to oranges.
-Dan