So, I wrote a quick plugin to get the map list from the server's memory (more specifically from the ServerMapCycle StringTable).
I know it works on TF2, but I need to know if it works on other games.
Particularly, I'm interested if it works with CS:GO and in particular if it works with CS:GO Workshop map collections.
The plugin is attached and the (admin) command to run it is /mapcycle
Edit: Dumb me made it reply to this command in whichever method you used to call it, so if you don't call it via the server console, it will display in the chat.
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Not currently working on SourceMod plugin development.