This is how I trained my GSP to not be gun shy.

I bought a very inexpensive blank pistol and tied her up on a lead about 30 feet long. I tok her out for a walk into a crp field. I let her get as far out on the lead as she could and then would fire the cap pistol while walking behind my back the first time and act like nothing happened. She turned back to look and see what happened the first few times but realized I was paying no attention to it and just kept going. The next steps are to bring her closer in each time and do the same thing. Eventually the dog will be right underneath you and should not care about the noise.

Then I moved up to a 20 GA shotgun and fired blanks thru it with the same method, and then the 12 gauge.

As was stated before most pointing breads know how to point. You can only teach them to listen to what you want them to do like Woah, Heel, Come. I did the old fishing pole Pheasant wing thing as well.

Then just started taking my dog hunting and only shooting birds that she pointed. She is still only a little over 2 years old but is progressing very well. She is amazing to watch, especially since I trained her myself. Very gratifying.