The installation I had issues with earlier today was locally on my own computer. I'm also responsible for a server a LAN party is renting, so when I had a successful installation locally, I went on and uploaded EventScript and GunGame to the remote server.
When I want to load using es_load gungame51 I get this error message: Can't load addon (gungame51): libsqlite3.so.0: wrong ELF class: ELFCLASS64
Any clues on how to fix that? Google wasn't really helpful here.