Here you can download GAG. The file (GAG-4.10.ZIP) is the distribution itself, ready to be used, and contains ALL the available languages (Instructions are in english, but after pressing 'Install GAG', you will be prompted for the language). In that file you can find too all the files needes to create GAG from scratch, if you want.
If you preffer, you can use the mirroring facilities from Sourceforge to download the files from a nearest mirror.
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