Rendering, extracting, subtracting, snipping, call it what you will, the path tool is the easiest, safest, and best way to remove a background or isolate an object.
From Learn GIMP
Erase the background from around your picture easily using alpha channel. http://www.PenguinTutorials.com/
How To Cut Out A Image In GIMP 2.10 Beginners Guide Part 4 | Getting Started With GIMP 2.10 In this Gimp 2.10 Tutorial I will be showing you how to cut an ...
From ComputerSluggish Tutorials
How To Remove Background in Gimp in 5 minutes or less. It's actually pretty simply to remove backgrounds from any image using the free gimp software.
In this video, I will demonstrate how to take pictures on the green screen and use the color select tool to remove the green background. Also, I will insert a ...
From Chris Groff