It seems like Gemini Man was treated better in Europe than it was in its home country. This Annual, which would have come out around Christmas 1967 in the United Kingdom, is filled with comic stories, text stories, bios of the cast, factual articles and lots of pictures of Ben Murphy. I love it. It doesn't quite resemble the TV show itself. There are some strange non-Gemini Man moments. But, it's still fascinating.
Here are a few fun pages: