You can easily collect the GPS Location data (Co-ordinates - Latitude, Longitude) from Google Maps in Clappia. Here's how:
While you are designing your app in Clappia using the GPS Location block, select Show advanced options in the right panel.
From the advanced options enable the Default to current location option.
When the user opens your app the GPS Location is automatically captured.
Since 'Allow user to manually change location' is disabled, the user cannot edit this data.
NOTE: GPS Location must be turned on in the users' mobile phone for the app to capture the location co-ordinates.