Well, looking at the covers on GCD, it looks like a lot of fun. It also seems to be VERY scarce, I think the four issues I found may have been the only Kelly issues currently findable for sale on the internet, period. I wouldn't mind seeing the post-Kelly issues, either. They're by Al Hubbard, who is a quite underrated artist. He's no Kelly, of course. But he did a long run on Mary Jane and Sniffles, which is one of my absolute favorite GA series.
Oh, some copyright information from the Cover of issue 15, which I found online:
There is a line at the bottom of the cover that reads, as best as I can make it out:
COPR . 1949 BAKERS ASSOCIATES, INC. PRINTED IN U.S.A. NO 15
I'm no expert, but based on what little I know that may not even have been a correct registration in the first place, assuming they don't have more information elsewhere.