Do not forget that there are a couple of scripts in the package as well.

/usr/share/gimp/2.0/scripts/gap-dup-continue.scm
/usr/share/gimp/2.0/scripts/sel-to-anim-img.scm

On the subject of location, I had it running one time from ~/gimp-x.x.x since I only use GAP once-in-a-blue moon for very limited purposes. From memory it worked ok.

Add the directory location to the gimp plugins locations.

Just noticed the size of samj's installation..wow

Oh, rich2005 is right, you should also copy them in your /home gimp folder, or from "/usr/share/gimp/2.0/scripts/" to "/usr/local/share/gimp/2.0/scripts/" if you copy from the debian package.

Just I realize the size has samj's file. Why is it so big? The debian package gimp-gap has only ~4MB. What I'm missing?

Sorry, I'm with a bad internet connection. I can not download it and check it myself

You guys are right. I didn't notice how large the plug-ins are. Perhaps rather than using shared libs, the full libs were statically linked to the plug-ins. That's the only thing I can think of that would have generated such large plug-in file sizes.

Also, good point about the scripts. They are not included in Sam's zip.

True but the 2 scripts are trivial to install
Now i don't have at hand but i may search and zip , may be installed as any other script (ie moved in a gimp script folder )

PS thinking better i have somewhere a large "animation" script folder with that and many other animation script , all should still work fine but a few may have recent updates that i may have missed

Anyway if somebody think useful i may search and upload ...

@GnuTux
...the full libs were statically linked to the plug-ins. That's the only thing I can think of that would have generated such large plug-in file sizes.
This is true

*****

For translations, I think we should unpack as indicated in my previous post.
To obtain :
/gimp-gap-64bit-20130909/share/locale

It is not necessary to move the plug-ins. It is possible to declare this directory in Gimp preferences for the user who wants to use them.

Ran across this same message during my compilation attempt. The fix is to start with a clean source folder. I used the one included in the zip posted by samj: gimp-gap-src-20130909

After running ./autogen.sh (as regular user), edit Makefile in the gap folder.

Locate..

Replace with..

Save Makefile.

From the folder: gimp-gap-src-20130909 , run make (as regular user).

Assuming that it compiles clean, with no errors, you can run "make install", as root, from the folder: gimp-gap-src-20130909

Thanks for all the help and advice everyone, it's real good of you all
I decided to go with what for me seemed the easiest solution, I can get pretty lost with all the command line stuff, and added the location of the Gap plug-ins, which are already installed on my system, to Gimp preferences, as suggested by Rich2005. I also checked to see if the other Gap files were where they're suppose to be and they are. I restarted Gimp and Gap is now working. The video tab appears at the top of Gimp's window and everything that should be listed under it is.
It's a bit of a mystery as to why Gap's plug-ins end up in the wrong location after installing via synaptic, but I thought it best to leave them where they are as everything now works.
Gimp and Linux, it can be frustrating but it's never boring.

You got that right Caz.