[Mauzen]

pawn Код:

// in OnGameModeInit()
SetTimer("AutoRestart", 86400000, 0); // 86400000ms = 24 hours

// somewhere else
forward AutoRestart();
public AutoRestart() {
    SendRconCommaned("gmx");
}

Would also work, probably the "cleanest" version, as it doesnt need any other timers or checks.