I would say this is a great upgrade from Gimp.
Uh, yeah. No contest.
Oh! And while I’m here—if you’re looking for a Lightroom alternative, ON1 is also 50% off. You can get one of the greatest alternatives to Lightroom (in my opinion), for $50 one time (you’ll pay for upgrades in 2021, but nothing’s stopping you from keeping this version forever.
https://www.on1.com/