With this little program made only for my personal use you can generate a palette from a GIF file made with the split technique described here.

Download my personal ColorCounter program by clicking

DOWNLOAD mac

DOWNLOAD windows

Start window

Drag and drop the GIF file from the finder window onto the lower part of the ColorCounter window.

Image and palette.

Save a CSV file. The numbers exported are the RGB values and the percent of each color in the image.

Save the palette as a GIF file

The GIF file in the finder.