CMD:salir(playerid, params[])
{
    if(Entrando[playerid] == 0)
    {
        Entrando[playerid] = 1;
        SetTimerEx("Entrandos",3000,false,"d",playerid);
    }
    if(IsPlayerConnected(playerid))
    if(PlayerInfo[playerid][EnGarage] > 0)  // Salida de garajes
    {
        for(new i=0;i<MAX_CASAS;i++)
        {
            if(CasasInfo[i][hID2] == PlayerInfo[playerid][EnGarage])
            {
                if(CasasInfo[i][hcomprable] == 1) return 1;
            }
            if(CasasInfo[i][hID2] == PlayerInfo[playerid][EnGarage])
            {
                new vid = GetPlayerVehicleID(playerid);
                if(vid != autos[playerid] && vid != autos2[playerid] && vid != autos3[playerid] && vid != autos4[playerid]) return SCM(playerid,-1,"Solo puedes sacar tus vehiculos del garaje.");
                if(!IsPlayerInAnyVehicle(playerid)) return SCM(playerid,-1,"Debes estar en un vehiculo para salir del garaje.");
                if(vid == autos[playerid])
                {
                    SetVehiclePos(vid, CasasInfo[i][gsx],CasasInfo[i][gsy],CasasInfo[i][gsz]);
                    SetVehiclePassengersInteriorEx(vid, 0);
                    SetVehiclePassengersVWEx(vid, 0);
                    PlayerInfo[playerid][vinterior] = 0;
                    PlayerInfo[playerid][vvw] = 0;
                    PlayerInfo[playerid][EnGarage] = 0;
                    SetVehicleZAngle(vid, CasasInfo[i][gsa]);
                }
                else if(vid == autos2[playerid])
                {
                    SetVehiclePos(vid, CasasInfo[i][gsx],CasasInfo[i][gsy],CasasInfo[i][gsz]);
                    SetVehiclePassengersInteriorEx(vid, 0);
                    SetVehiclePassengersVWEx(vid, 0);
                    PlayerInfo[playerid][v2interior] = 0;
                    PlayerInfo[playerid][v2vw] = 0;
                    PlayerInfo[playerid][EnGarage] = 0;
                    SetVehicleZAngle(vid, CasasInfo[i][gsa]);
                }
                else if(vid == autos3[playerid])
                {
                    SetVehiclePos(vid, CasasInfo[i][gx] ,CasasInfo[i][gy] ,CasasInfo[i][gz] );
                    SetVehiclePassengersInteriorEx(vid, 0);
                    SetVehiclePassengersVWEx(vid, 0);
                    PlayerInfo[playerid][v3interior] = 0;
                    PlayerInfo[playerid][v3vw] = 0;
                    PlayerInfo[playerid][EnGarage] = 0;
SetPlayerInterior(playerid,0);
SetPlayerVirtualWorld(playerid,0);
SetPlayerPos(playerid,CasasInfo[i][gx] ,CasasInfo[i][gy] ,CasasInfo[i][gz] );
                    SetVehicleZAngle(vid, CasasInfo[i][gsa]);
                }
                else if(vid == autos4[playerid])
                {
                    SetVehiclePos(vid, CasasInfo[i][gx] ,CasasInfo[i][gy] ,CasasInfo[i][gz] );
                    SetVehiclePassengersInteriorEx(vid, 0);
                    SetVehiclePassengersVWEx(vid, 0);
SetPlayerInterior(playerid,0);
SetPlayerVirtualWorld(playerid,0);
SetPlayerPos(playerid,CasasInfo[i][gx] ,CasasInfo[i][gy] ,CasasInfo[i][gz] );
                    PlayerInfo[playerid][v4interior] = 0;
                    PlayerInfo[playerid][v4vw] = 0;
                    PlayerInfo[playerid][EnGarage] = 0;
                    SetVehicleZAngle(vid, CasasInfo[i][gsa]);
                }
                return 1;
            }
        }
    }

public OnPlayerUpdate( playerid )
{
    static
        Float: X,   Float: Y,   Float: Z
    ;
    GetPlayerPos( playerid, X, Y, Z );

    if( X >= 99999.0 || Y >= 99999.0 || Z >= 99999.0 || X <= -99999.0 || Y <= -99999.0 || Z <= -99999.0 ) {
        SendClientMessage( playerid, 0xa9c4e4ff, "Warning: Estas fuera del mapa!!");
    }
        return 1;
}

SetPlayerWorldBounds(playerid, 20000.0000, -20000.0000, 20000.0000, -20000.0000); 
NOTA: si sales de la poscion del gta sa te volvera donde estabas.
https://sampwiki.blast.hk/wiki/SetPlayerWorldBounds

PD: utiliza  printf en los SetVehiclePos para ver si te esta dando correctamente las coordenadas.
https://sampwiki.blast.hk/wiki/Printf