I want a Linux program that fits these requirements:

* ✅ Shows differently pictures that contain GPS latitude/longitude in their EXIF.
* ✅ Thumbnail-centric: Shows a thumbnail of each picture in a folder. It can be a file browser, but most of the screen space must be occupied by the miniature images rather than text.
* ✅ Supports drag-and-drop to modern web browsers
* ✅ Fast
* ✅ Open source

It could look like this (I am open to other designs):

[![File browser with GPS overlay](https://i.stack.imgur.com/NW5ht.png)](https://i.stack.imgur.com/NW5ht.png)

My final goal is to easily find good pictures (while preferring those that contain location data) and upload them with the mouse.

([*related question for Android*](https://softwarerecs.stackexchange.com/questions/51639/android-file-explorer-with-programmable-icon-overlays-ex-show-globe-if-picture))