This Gigan is the version shown in Godzilla Final Wars. In Final Wars, the alien Xillians revive the mummified Gigan to fight Godzilla.The version you see here is the first version in the movie. This version is defeated, and is upgraded with chainsaw weapon hands.

Godzilla: Final Wars (ゴジラ ファイナルウォース, Gojira: Fainaru Uōsu) is the 50th anniversary film, the 6th and ostensibly last of the "millenium" era films (not counting the US atrocity), and the 28th installment in the overall Godzilla film series. (Wikipedia)

This figure was released during Bandai Creation's last Godzilla line and is identical to the 2004 Japanese release which had a tag instead of the cardboard packaging. Articulation is limired to the head, arms and legs. The detail on this figure is really amazing - it is one of the best figures to come out of Bandai Creation's Godzilla line.