Entrance to Gaia's Temple is gained through Gaia's Garden in east town. Inside this garden is a tree that, when bumped, makes you notice:
The tranquility of the empty garden is perfect. Its serenity is absolute.
This tree is the entrance to Gaia's Temple. However, the entrance can only be opened by Gaia herself.
The tree leads to the west garden of Gaia's Temple. The west and east gardens are connected to one another; while the mirror is connected to the interior of Gaia's Temple. The Statue inside Gaia's Temple acts as an alter, so that people who have set the Gaia's Temple as their temple can return there when they depart or use a Purgatory Pendant.