Access the SD card and go to the: "../FlightLog/Telemetry/" directory. From here select the file that was written last, assuming the date on your controller was correct. It will look like "Telemetry_00XXX.csv". Then open it in either Excel or notepad or any text editor. Go to the last line and count over 5 commas, and that will be the last Latitude and Longitude received.
Mine looks like this:
Then simply copy and paste the latitude longitude into a web browser to show the location:
This is the last location received and may not be the actual last location. Meaning you may have lost connection. Hope you find it.
You can use q500log2kml to create a 'playable' flight path for GoogleEarth to see what the copter has done (speed, direction).
Any coordinate can be displayed in GoogleMaps or OpenStreetMap by menu at right mouse button.
Also diagnostics are possible.