I can't speak for Gemini, but when I found out about Gopher I read the specification and made a very simple server implementation for myself. If you're looking

I can't speak for Gemini, but when I found out about Gopher I read the specification and made a very simple server implementation for myself. If you're looking for a quick project to play with, it's not a bad one to try. It didn't support everything, mostly just basic browsing and linking. But it was cool to build something mostly compliant to a spec that quickly.