Okay, you got me. heh.
I don't own a 45 GAP; but conceptually, I like the cartridge. I see it as a "modernize" 45 ACP - same performance in a shorter package. Seems to me, the slide needing to move less to perform the same task would be a good thing.
And being a shorter package (less internal case space), I can see how HS-6 would work well with 200 grain bullets in the GAP. That makes perfect sense.