We have a central storage location for files like photos, videos and sounds: Commons. But it seems there is no central storage space for KML script files. Those files are used for templates on various Wikipedias to show a route of a subject on Google Maps, Bing Maps, etc.
But also in templates in other Wikipedias. The same as with photos, a central location for these files is needed to prevent every Wikipedia have the same KML file. It seems logic to me to have a central location for this.