[Threshold]

pawn Код:

CMD:restart(playerid,params[])
{
    SendRconCommand("gmx");
    return 1;
}

EDIT:
STRCMP

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(strcmp(cmdtext, "/restart", true) == 0)
    {
        SendRconCommand("gmx");
        return 1;
    }
    return 0;
}

??