Well, tbh Galimulator 5.0 isn’t that much of an improvement to be worth it. And Galimulator on Steam isn’t being updated really so there’s that.
Anyways, I might backport the Galimulator CE modpack to 4.10 (especially because Galimulator can no longer be purchased on Steam in Germany) - it’s a bit of work, but mostly overdue work, so stay tuned (will only take a year or so)!