[Mean]

Make a pickup:

pawn Код:

new pickup;

public OnGameModeInit()
{
    pickup = CreatePickup(...);
    return 1;
}

pawn Код:

public OnPlayerPickUpPickup(playerid, pickupid)
{
    if(pickupid == pickup)
    {
        SetPlayerPos(playerid, x, y, z);
        //...
    }
    return 1;
}

Or use IsPlayerInRangeOfPoint in a command