This is quite interesting, and not something I’ve come across before, although it appears the idea has been out for a little while now. As more users are starting to use Linux on the desktop, they’re starting to turn to GIMP for some of their photo editing needs (after all, Adobe doesn’t do Linux). It’s a somewhat unfamiliar interface if you’re coming from Photoshop, but this GIMP patch could make life a little easier.
PhotoGIMP is a patch for GIMP 2.10 for Linux which essentially changes the UI to look like Photoshop. It’s not actually turning GIMP into Photoshop. It can’t do that any more than you can turn Ubuntu into MacOS. The changes are only skin deep. You’re not going to get all the latest CC tools, but what you will get is a familiar look and layout to get you up and running as quickly as possible.