[Bacardi]

...@Mikaeel, you will run into CS:GO mapgroups/gamemodes configure files which give anyone little headache.

Normally ...cfg/server.cfg file works, but keep in mind in CS:GO,
on map change it execute also certain gamemodes CFG files after server config file to reset some game cvars back to "Valve settings".
You can find those configs in ...cfg/ folder called gamemode_x.cfg.
However, don't edit those files because those will get rewrite back original when you update your server via SteamCMD.

To override "Valve settings", create gamemode_x_server.cfg and add your cvars there.