Found the actual reason is few tags of the content in the GPX file is not supported by XCode.
iOS does not support tags with tracking data.
<trk>
<name>12</name>
<trkseg>
<trkpt lat="some value" lon="some value">
</trkpt>
<trkseg>
</trk>
So, get rid off all trk , trkseg tags. Now repleace trkpt with wpt.
That's it and you will be able to see simulation of your path.
Found the refernece at : http://deneymo.blogspot.com/2013/12/ios-customise-gps-path-for-simulator.html
A GPX file with only wpt points can be created here . http://gpx-poi.com
According to the following link https://developer.apple.com/library/content/documentation/IDEs/Conceptual/iOS_Simulator_Guide/CustomizingYourExperienceThroughXcodeSchemes/CustomizingYourExperienceThroughXcodeSchemes.html
Xcode and Simulator support specifying a route as a series of waypoints using the GPX <wpt>
tag. The route (<rte>
) and track (<trk>
) tags are not supported.