|This article is about a/an monster evolution status in Kamen Rider Ghost.|
A Giant Gamma (巨大眼魔 Kyodai Ganma) is a form which can be accessed when an Empowered Gamma absorbs either a Parka Ghost before a Kamen Rider catches it in their Ghost Driver, a large construct, or other Gammas, causing them to change into a bigger and more powerful form based on their unique motifs. In order for Kamen Rider Ghost to free the Parka Ghost so he can create a Ghost Eyecon from it, he must first defeat the Giant Gamma to separate both the Empowered Gamma and the Parka Ghost that the monster has absorbed. The Iguana Ghostriker is most useful at dealing with Giant Gamma.
- The Denki Gamma became a giant destroyer ship with legs when he absorbed the Edison Parka Ghost. He was defeated by the Iguana Ghostriker, reverting him back to his humanoid form as the Edison Parka Ghost was released.
- The Insect Gamma became a giant bulldozer when she absorbed a construction site. She was defeated by the Iguana Ghoststriker and Kamen Rider Ghost's Ore Omega Drive, reverting her back to her humanoid form.
- The Renaissance Gamma was transformed from the Da Vinci Gamma when he absorbed the powers of the Raffaello Gamma and Michelangelo Gamma. The Renaissance Gamma was ultimately destroyed by Kamen Rider Ghost Tousan Damashii and Kamen Rider Drive Type Tridoron.