Incredible. This is one of those hard to believe moments.
It’s been 21 years since the release of GIMP 2.0.
It’s been more than 10 years since work on a majorly overhauled GIMP 3.0 was announced and initiated.
And it’s been 7 years since the last major release (2.10).
I can’t wait for the non-destructive text effects. After all these years of dealing with the fact applying drop shadows meant the text couldn’t be edited, at last it’s no longer an issue.
There is AFAIK no way to do this.
Apple’s never open-sourced the APIs and interfaces and it only works on Macs and Windows. For this you will need to have either a Windows install (recommend separate drive so it doesn’t break Linux bootloader) or a persistent or not Windows VM with USB passthrough. I’m not even sure how well the VM situation works but it probably should. You don’t even have to have a license for Windows, you can just run it in the VM for this purpose alone but it does mean oh at least 40GB set aside on your drive for the VM image plus more if you want to do things like back-up the phone.