The Maser Cannons, from the Godzilla movies, are seen in the first episode and in the opening credits fighting the Akelon Invaders.
The docking bay used by the Type-05 GS Assist Robot "Youhi" was originally used by the "Kiryu" Mechagodzilla in Godzilla Against Mechagodzilla (2002)
Had a follow up, direct-to-video movie based on the show called The Gransazers: Super Battle Memory (2005).
Early English promotion for the show dubbed the series as: "The Gransazers: Battalion of the Zodiacs".
A three volume manga series was released for GranSazer. It features a condensed version of the series' story with several differences from the TV series.