The manga itself is not complete, this is just part 1 of the story. Gantz resumed it's bi-weekly run on November 16th with "GANTZ 2nd Phase: Catastrophe".
"The Gantz manga is much more explicit than the anime with regards to violence, language, sex, nudity, and general harshness. However it is also widely regarded as being much better and more detailed."
"GANTZ 1st Phase" (Chapters 1-237)
"GANTZ 2nd Phase: Catastrophe" (Chapter 238-263 and continuing)
-=Download Links For The Manga:=-
http://rapidshare.com/files/77061951/GantZ_v01.rar
http://rapidshare.com/files/77062992/GantZ_v02.rar
http://rapidshare.com/files/77064053/GantZ_v03.rar
http://rapidshare.com/files/77065176/GantZ_v04.rar
http://rapidshare.com/files/77066225/GantZ_v05.rar
http://rapidshare.com/files/77067719/GantZ_v06.rar
http://rapidshare.com/files/77069229/GantZ_v07.rar
http://rapidshare.com/files/77070997/GantZ_v08.rar
http://rapidshare.com/files/77073021/GantZ_v09.rar
http://rapidshare.com/files/77074415/GantZ_v10.rar
http://rapidshare.com/files/77075803/GantZ_v11.rar
http://rapidshare.com/files/77077145/GantZ_v12.rar
http://rapidshare.com/files/77078665/GantZ_v13.rar
http://rapidshare.com/files/77080014/GantZ_v14.rar
http://rapidshare.com/files/77081436/GantZ_v15.rar
http://rapidshare.com/files/77083018/GantZ_v16.rar
http://rapidshare.com/files/77084694/GantZ_v17.rar
http://rapidshare.com/files/77086997/GantZ_v18.rar
http://rapidshare.com/files/77088363/GantZ_v19.rar
http://rapidshare.com/files/77089686/GantZ_v20.rar
http://rapidshare.com/files/77060997/GantZ_c238_GantZ_c263.rar
http://rapidshare.com/files/77057541/GantZ_c238_GantZ_c263.r00