Where I can find GPX files that I can import into my iOS Simulator?
The iOS Simulator only contains static locations around the world and walk / bike / car drive simulations. This is not good enough for unit testing or other specific use cases.
This is the for GPX file: http://www.topografix.com/GPX/1/1/gpx.xsd
How can I simulate a movement along some custom route in Simulator or Xcode, cause it's needed in ios mobile development?
You create a route and generate a gpx file here - http://www.bikehike.co.uk/mapview.php
On another note it might help, are you aware the simulator can simulate movement if you run the simulator then select the following menu options: