The GAT-X1022 Blu Duel Gundam is a Mobile Suit in the OVA Mobile Suit Gundam SEED C.E. 73: STARGAZER. It was piloted by Mudie Holcroft.

The Blu Duel Gundam is a modified GAT-X102 Duel Gundam produced as part of the "Actaeon Project", a joint development between several companies led by Actaeon Industries and Phantom Pain. The main aim of this project is to create customized MS for use by Phantom Pain's ace pilots.

Among the upgrades to the Duel is a new version of the Fortrestra Armor, the Alliance's version of the Assault Shroud armor. Unlike that used by the GAT-01D Long Dagger and GAT-01D1 Duel Dagger, the Blu Duel's is fully integrated into the body of the suit and thus cannot be ejected. Another difference is that the Blu Duel's lacks the missile launcher present in the Assault Shroud and the previous Fortrestra armors, instead equipping a single compartment in its left shoulder storing three anti-armor penetrators, which are thrown manually. Other armament of the Blu Duel includes a shield mounted on the right shoulder with a railgun underneath, a pair of retractable beam guns mounted to its forearms, two beam sabers stored on the legs and two head-mounted CIWS guns.

Like its sister units, the Strike Noir and the Verde Buster, the Blu Duel is equipped with a power extender and Variable Phase Shift armor, which is also applied to the Fortrestra Armor.