Noticed this after using such an app. The last map used/viewed remains in the app folder somewhere. I don't know if this is a good thing but doesn't seem necessary and surprised CCleaner does not erase this form of data in such a small app.
Include the file for cleaning
https://www.ccleaner.com/docs/ccleaner/using-ccleaner/including-files-and-folders-for-cleaning
Unfortunately it didn't work. The gps files remain.
can you show a screenshot of your CC > Options > Include list, or if saved to the ccleaner.ini file, attach that.