I see that the street for the properties is correct, but the map incorrectly says "Sosnowa".

I've passed the gate several times, but I just checked on StreetView on Google Maps to make sure: the road is private, ie closed to the public. There is an electric gate for cars, and a gate for people where there seems to be an entryphone with a keypad.

The gates are located at ul. Stefanii Czubryj.

Ul. Sosnowa actually runs off ul. Młyńska - Google Maps have just recently drawn this properly.