Until I find a better way for people to down load the gpx files, use the following method.
Right click on the file link.
     - Select “Save Target As…”
     -When naming the file change the file extension from “.xml” to “.gpx” 
*If you have problems changing the file extension, in the folder try changing the “View” of the files to “Detail” then rename the file with the ".gpx" file extension.