[Google Maps API v2] Spatial Reference Convert

i need help to find what the kind format of this data?

<gml:PolygonProperty>
<gml:Polygon>
<gml:outerBoundaryIs>
<gml:LinearRing>

<gml:coordinates>8029.8700680870015,-199113.16423533563
8334.809727050282,-198938.91300164233
8550.445628745745,-199058.71072480647
8705.093598648551,-199335.3345582946
8295.60319946929,-199572.7518642017
8029.8700680870015,-199113.16423533563 </
gml:coordinates>
</gml:LinearRing>
</gml:outerBoundaryIs>
</gml:Polygon>

</gml:PolygonProperty>

i think this is format data NAD1927
how can i convert to latitude n longitude format data?

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