GIMP How to make existing gif background transparent - Graphic Design Stack Exchange

I have the following gif, how to make the grey background transparent if not white?

Gimp User's Manual - Discrete Imaging and Graphics Group

Álvaro Ramírez

Gimp: Can't use fill bucket to fill selection - Ask Ubuntu

AP - how to replace black with a different color? Color replacement brush doesn't work - Tutorials (Serif and Customer Created Tutorials) - Affinity

Compare the 11 Best Graphic Design Software (2023) - StartUpAm

700+ Awesome Graphic Design Resources to Keep on Hand

Micro Focus Desktop Containers 20.0 Documentation

gimp - Change one colour to another? - Super User

Computer math

Keyword:web use - FasterCapital

gimp - Using a black and white icon having antialias for white background on a different color background - Stack Overflow