It's in the 500+ lb range, maybe more. I'd definitely recommend using equipment to lift it if available. If not, then 3-4 people would be the minimum I'd suggest, as it's awkward.
Personally I would recommend a trailer, one that is wider than the top would be in order to support it on both sides. Could use plywood to widen a narrow trailer, but between the plywood and the design of the top you'll be catching a lot of wind with it.
That being said, you probably COULD support it across the bed of the truck using plywood or some other method to support it along the sides, and then put some foam or a movers blanket or something and support the front of the top on the cab of the pickup. (I'd secure the plywood across the top of the truck bed at full width, then screw some 2x4's to either side of the top where it rests on the plywood to make sure it doesn't shift side to side. After that run a bunch of straps over the top of everything, at least 2 from side to side, and I'd also do one from the front of the truck and over everything down to the back.) If it's an 8 foot truck bed you don't even really need to have it hanging over the back if you support the front with the truck cab, you can slide it forward until the b pillar is at the back of the truck cab.
Mostly you just need to worry about the B pillar fiberglass post portion on each side, as that's the weakest link. Shouldn't be an issue if you support it along the back sides and the front, then lightly secure those B pillar portions lightly to keep them from flapping around and causing issues.
Lots of 2x4's, some plywood, a saw to cut everything to size, and a whole bunch of tie down straps and it's doable.
(When I picked up mine, it was the tall version of the top. I used a flatbed truck and some big blocks of wood. Set the front down on the blocks of wood, 3 2" straps over the top side to side, then used the inside anchor points in the roof to fasten it down to the truck as well to keep it from shifting. Only 100 miles but no problems. Cab blocked most of the wind and there was no rear door so air went right through.)
Hopefully the general idea of what I'm saying made it across, if not I can try to clarify.