forward GateCheck();
public GateCheck()
{
    for(new i=0; i<MAX_PLAYERS; i++)
    {
        if(IsPlayerConnected(i))
        {
            if(IsPlayerInRangeOfPoint(i, 10.0, 2641.8201, 2810.6196, 36.3222))
            {
                MoveObject(AutomaticGate, 1811.4591, -1894.3032, 13.2392, 5.0);
            }
            else
            {
                MoveObject(AutomaticGate, 1811.4558, -1894.2816, 12.4562, 5.0);
            }
        }
    }
}

SetTimer("GateCheck", 1000, true);

AutomaticGate = CreateObject(968, 1811.4591, -1894.3032, 13.2392, 0, 0, 0);
new AutomaticGate;