First off, let me say that I do not have a .45 of any type any longer. I just saw no need for it any more. In my opinion the .45 GAP is a gimmick.
If you have ever fired there model 35,[ there single stack .45 ACP ] it is a very hard recoil and a whole lot of people did not like it at all, including me. They just down loaded it a little to help tame it. The .40 cal is nothing more than a down sized 10mm. The .380 is a down sized 9mm. And the .45 GAP is a down sized .45 ACP. I carry a model 19 and I love it! A 15 round mag, with one in the chamber 16. A large caliber pistol has a lot of merit. But I would rather be very good with a pistol I can completely control, and hit what I am aiming at. A heavy cal pistol will always have it's place. But I would rather carry a large capacity side arm. I hope this answers your question.