is a Japanese tokusatsu series that began airing from October 1, 2006 to November 24, 2006 in Japan, lasting 13 episodes. It is the third part in the Lion-Maru trilogy, following Kaiketsu Lion-Maru and Fuun Lion-Maru. The "G" is short for 'Ghetto'.
This series follows the story of the reincarnated Lion-Maru and Tiger Joe from the original Kaiketsu Lion-Maru. The story is set in the year 2011 in Neo-Kabukichō, a fictitious version of the real red light district of Shinjuku, Tokyo.