Another American Godzilla product available in 1978 was a set of View-Master reels, which were available in several permutations, although all were the same story. (And once again, the Godzilla on the cover of his first Marvel comic gets used--although the story here is based off the second Marvel issue, so go figure.)
I never had a "Talking View-Master" as a kid, so unfortunately, I can't play the audio with this set, but they are normal View-Master reels with a hard-plastic white disc attached that look very much like small vinyl records. It's either extremely clever, or extremely awkward, technology, and no doubt would completely baffle children today. I'd be curious to know if the recording is simply a narrator describing Godzilla in Seattle, or a bigger production with voice actors and sound effects.
The Double-Vue Automatic Movie Viewer allowed for cartridges that contained two different stories, in filmstrip format. The cartridge featuring Godzilla is copyrighted 1979.
Notice how GAF tried to be logical in their pairings: Spider-Man and Thor, check. Bugs Bunny and Sylvester & Tweety, check. Frankenstein and Dracula, check. Poor Godzilla gets paired with Mr. Magoo.