|This article is about a/an form in Kamen Rider Zi-O.|
GaimArmor (鎧武アーマー Gaimu Āmā) is a Kamen Rider Gaim-based form accessed using the Gaim Ridewatch, invoking Kamen Rider Gaim's Orange Arms. When summoned, it takes the form of a giant Gaim head before attaching to the user and transforming into armor. Depending on whether it is used by Zi-O or Geiz, its visor spells out "Gaim" (ガイム Gaimu) in katakana or "Gaim" (がいむ Gaimu) in hiragana respectively.
On December 8th 2018, Zi-O assumed the GaimArmor alongside Geiz WizardArmor to fight Another Ghost. When the Time Jacker Heure attempted to intervene, Zi-O summoned the Kodama Suika Arms to ward him off. Soon after, Geiz pointed out that it was more appropriate to use Ghost's power and so loaned him the Ghost Ridewatch to assume GhostArmor.
- The "giant head" form GaimArmor takes before transforming into armor references Armor Parts, specifically the Legend Rider Arms such as Wizard Arms or Gaim Arms.
- Gaim's face forming the chest specifically references 1 Arms.
- Similar to Another Gaim, the armor's design leans towards Kachidoki Arms, but with the weapon access of Fresh Orange Arms instead.
- Kamen Rider Zi-O
- Another Gaim - The result of using the Another Gaim Watch