That sucks. You did the right thing wait to track on a gut shot I usually give it 10 hrs. It is bad to lose a deer but at least you can be respected for working your tail off to find the deer. Most people would give up. Hang in there you will find it If there is water around you might want to look there if he is shot in the stomach he will need to drink water to sooth the pain they also will roll in the mud