GAP on GIMP 2.6.7

Hi,
A newbie here, a very beginner with GIMP (but patience and long time is better than force and rage, as we say in my mother tongue ;-)).

I'd like to create an animated GIF, so I found the animated package.
The only *slight* problem is that I don't have the palest idea (from an Italian expression which means that I don't have any idea) on where can I download it, and where and how to install it.
Tried with the search motor with "GAP", but I found nothing for GIMP 2.6.7

=> Any idea on how to help me ?

Thanks in advance for your help