The intelligent Gorillas in this story came from a "two mooned world" that Congo Bill assumed to be Mars.
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In the DC Animated Universe continuity, Detective Chimp is portrayed as a citizen of Gorilla City, but does not actually appear until the end of the story as he'd been impersonated by Gorilla Grodd for much of the issue.
During the Blackest Night, Barry Allen raced to Gorilla City to seek aid from Solovar, not knowing of his death.