If you donīt like mediafire, try to download the files here:
GWX3-1.bin
GWX3-2.bin
GWX3-3.bin
GWX3-4.bin
GWX3-5.bin
GWX3-6.bin
GWX3-7.bin
GWX3.exe
Username: Maik
Password: Woelfe
Or try to download with filezilla.
GWX is inside the folder: public/Sharing/SH3COMMUNITYMODS/GWX - GREY WOLF EXPANSION/GWX 3.0 GOLD/