The game heavily references the Trigun (Toraigan) anime series. The character designs, shooting, and music are very similar to Trigun's. This is because many of Gungrave's crew also worked on Trigun.
Gungrave uses the same visual styles and camera angles as DMC. They have a similar storyline and the main characters (Grave in Gungrave, Dante in DMC) were designed to look similar.