I am a team member who translates Gantz to Russian.
Well I just canít wait until Shockwave next release, and my relative is Japanese philologist
So I get the raw manga print them and go to him asking for some wired thing to translate, actually it was weary fun. Then I just edited the manga to add English mostly I did it for myself but those to you who just canít wait here you go.
http://anime.vl-vostok.ru/manga/Ghost_Gantz_194eng.rar 5.9 Mb
I even add a bonus, my first exp in manga coloring. I will be glad to hear any comments or suggestion.