This is a Nextcloud Workflow App.
It is based on the app Nextcloud external script https://apps.nextcloud.com/apps/workflow_script, with the following improvements: works also for shared files and files in groupfolders. And of course it can save back the data of the modified file.
It removes the GPS-data of images and pdf.This app uses exiftool https://exiftool.org/. Not all GPS-data can be removed by exiftool.