Average GPS coordinates for Gymea Postcode location: -34.033, 151.083. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Gymea on map:

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Listing cities & postcodes (1):
>> New South Wales, 2227 Gymea, ILLAWARRA, GPS coordinates: -34.0333,151.0833