You can use your iPhone's built in GPS to display the latitude and longitude coordinates of your current location. Follow these steps to find your location coordinates in degrees, minutes and seconds:
- Make sure that Location Services is ON. Navigate to Settings -> Location Services -> ON
- In the list of apps under Location Services, make sure Compass is ON
- Press the Home button to exit Settings
- Open the Compass app
Your current GPS coordinates are displayed at the bottom of the screen.