[iggy1]

Like so,

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(IsPlayerInAnyVehicle(playerid))
    {
        if(newkeys & KEY_CROUCH)
        {
            if(IsPlayerInRangeOfPoint(playerid, 10, gatex, gatey, gatez)//swap for your gate coordinates
            {
                //open gate
            }
        }
    }
    return 1;
}