Two methods exist for importing gradient files into an already open Inkscape document. The first is to use your window manager to drag a file and drop it onto an open Inkscape window. The second is to use the File → Import... (Ctrl+I) dialog.
Imported Gradients will appear in the Inkscape Gradients menu under Fill and stroke Shift - Ctrl - F
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To Use these Gradients in GIMP you have to copy the .ggr Gradient Files to your local GIMP Gradient directory.
~/your user directory/gimp_version/gradients
Alternatively you can place them anywhere you want and point to those folders in program options.
Ready Gradients can be used with Blend Tool (L) to fill the selected area with the gradient of choice.Gimp has a powerfull Blend Tool with lots of options.
Another use for gradients is to use them while painting. Pencil, Paintbrush and Airbrush tools have options to use color from grandient instead of foreground color.
If you use a pressure sensitive tablet pen there is a choice to use a color from gradient under pressure sensitivity dialog.
Any B&W image can be remapped to a gradient under Color menu.
You can import a new palette from any gradient.
Those gradients who start with Atmospheric attempt to make Common Atmospheric Effects done in 3D programs in GIMP at ease of drawing a Gradient from bottom of image to top with Blend Tool.
There are many Basic Gradient possibilities that done for a quick visual reference and easy of use. Their names start with Basic. These are playings with pure form of primary and secondary colors along with white and black.
There are also a few modifications of original Gimp Gradients like neons in new colors, and a few unclassified new gradients that neither fit in atmospheric nor basic.
OH MY!!!!!!!!!!!!!!!! THANK YOU SO VERY MUCH!!!!!!! I make pictures using a 3d avatar and had very few gradients in GIMP. OH WOW!!! Your gradients are awesome and now I have so much to choose from and can make better pictures. So so happy. Thank you
Wow thisis AWESOMENESS! now i can continue working on my sig's & art for people! Thank you so much! GIMP is the BEST, Photoshop *which i call it photoshit sorry for the cussing* cant beat Gimp!