[Jeffry]

Could as well be with the check:

pawn Код:

if(!strcmp("/pay",cmdtext))
{
    if(IsPlayerInRangeOfPoint(playerid, 7.0, YourX, YourY, YourZ)) //7.0 is the range
    {
        if(GetPlayerMoney(playerid)>2000)
        {
            GivePlayerMoney(playerid, -2000);
            SendClientMessage(playerid,0xFFFFFFFF,"Gate opening!");
            //MoveObject...
            return 1;
         }
         else return SendClientMessage(playerid, 0xFF0000FF, "ERROR: You need 2000$ to open the gate!");
    }
    else return SendClientMessage(playerid, 0xFF0000FF, "ERROR: You need to be near the gate to open it!");
}

Just pick the one you want, and don't forget to fill in your coords. ^^