/SLASHPLAY
How to unban a player in GMod
Type removeid STEAM_0:1:12345678 in the server console to unban that SteamID, then writeid so the unban is saved.
removeid
Removes a SteamID from the ban list.
removeid <steamid> Examples
removeid STEAM_0:1:12345678 Unban a player.
Arguments
steamidRequired- SteamID to unban.
What it does
Run writeid afterwards so the unban is saved to banned_user.cfg.
The game's own description: Remove a user ID from the ban list.
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to garrysmod/cfg/server.cfg. New to this? Start a GMod server first.
Your own
GMod server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.