The Gradient Editor:
From this menu you can either EDIT an existing gradient, make a COPY of a gradient so you can edit it without making changes to the original, or you can create a NEW gradient. From this menu you can also DELETE or RENAME an existing gradient.
You can import Adobe Photoshop gradients (*.grd files), by clicking on the IMPORT button and find the *.grd files in your directory. In turn, you can EXPORT files to other programs by clicking the EXPORT button and then choosing a folder to save it to and naming it.
Now click the NEW or COPY button and give your NEW or COPIED gradient a name.