If you mean the Duck Hunter II by Gator boats, I built it three and half years ago. It was not difficult to build, I shot a limit of divers out of it yesterday in fact. There used to be a forum on Gator boats website that had an incredible amount of info related to building this boat. It would be unfortunate to build it without consulting that wealth of information.
I don't think the forum still exists so I'm going to tell you some of the things I feel one must modify about this boat to make it better. I really like the way mine turned out. I took all the rocker out of the rear of the boat, This made it easier to build (I think) and allows it to plane out and haul ass with a 25 on it. This is the only thing I really think you have to do, I couldn't imagine any advantage to not doing this. Of course by doing this I had to redesign the bulkheads and cockpit and move things around a little bit but it was really straight forward as you go what needs to be done. Also I would use two whole sheets of plywood for the entire floor. I followed the instructions and only used a small piece of plywood on the seam in the floor and down the center Line. I also glassed the entire floor inside the boat with 10oz cloth and epoxy resin. The floor is now cracking. There are hairline cracks all over the floor. Nothing too serious but I should do a major overhaul of some sort real soon. I use my boat in a large river that gets pretty rough some time. When I'm bouncing around I can see the hull flexing much more than I like. I put more glass on my boat than I read about anyone else doing. I glassed the entire hull inside and out with 10oz cloth and glassed all my bulkheads and all the seams inside the boat with bi-axial cloth that has chop mat on one side. The only part of my boat that doesn't have glass on it is the bottom of the deck and the deck framing and I painted all of these areas with epoxy resin. I used plane old exterior grade wood from lowes. Not a bit of Marine grade wood to be found. The transom and bulkheads are all made of Advantec. I love using this stuff in boats and highly recommend it. My boat has lived outside its whole life and is still in really good shape. I attribute this to all the glass I used. I made the combing around the cockpit out of 1x6's and have made a blind that is attached by sliding over the combing. The blind works great and is super easy to take on and off. I've got an open water grey paint job on the boat for open water sea duck hunting. It's like hunting out of a big layout boat. I then put my blind on and can pull up to the marsh and hunt. I usually run 75 diver decoys on long lines out of it and can hunt two people out of it this way with no problem. I have packed over a hundred decoys in the boat before.
I love this boat. I've been hunting out of it for three years now and it has worked great. I put a 25 Merc 2-stroke on it and it goes as fast you would ever want to go in this boat. I highly recommend building it, it's not hard.
As you can see I love talking about my boat so if you have any questions I'd be glad to help if I can.
good luck