GK's 5th offering, dated October 1962, was CHECKMATE, based on the TV show starring Doug McClure & Sebastian Cabot. The episodes I have seen were pretty much off the bore scale, so I really don't see how it even got a second issue.
The next month, November '62, (so probably on stands in September) saw the first of 2 GK editions of "77 Sunset Strip". Dell had multiple Four Color issues devoted to this, as well as a single shot edition published just prior to the Dell/Western split. I'd imagine all the production was done by the same people, and Russ Manning did the pencils. I have the FC issues...never have seen the GKs.
Also on the racks that month was BEN CASEY FILM STORY which I assumed used photos the same as the "3 Stooges in Orbit" also out that month.