Great !! Let me try 
I tried this one first. Everything works but the palette is not seen anywhere. How to fix ? Thanks.
Update :
Found it, thanks
(10-10-2021, 05:00 PM)rich2005 Wrote: another way
Use the gimp_gmic_qt plugin. In the rendering section, Gradient (from line)
That gives a pair of points (red and blue) that drag around. Give it a name. Ok it and it writes the file into your user profile gradients folder.
Then refresh the Gradients dock for it to show.
screenshots https://i.imgur.com/Er8XMFo.jpg
I tried this one first. Everything works but the palette is not seen anywhere. How to fix ? Thanks.
Update :
Found it, thanks