Again .. unless your RunGap activity shows Nike+ as the source, you don't have GPS data. All you have is a GPX file with activity data like HR, Distance, etc. There isn't any GPS data in Health.OK so i deleted the rungap upload to strava, exported the gps data using rungap on phone, which emailed me the gps data. I then uploaded the file to strava manually and I was able to see this when clicking on "Elevation" (which was 0ft initially)
Are you seeing a map in Strava?
I have done five runs using the NRC app and RunGap and the export to Strava worked perfectly each time. Have you deleted the activity in RunGap that lists Health as the source?