The Realm of the Gods is a beautiful paradise high above all the other realms where Deities may intermingle and socialize. Generally, it is an unspoken rule that the different alignments remain neutral while socializing but.. you can't always successfully tell a God what to do.
This realm also creates a duplicate of the Deities temple to mirror the one in the realm that mortals can access. This way the Deities still have a refuge to retire to or invite other immortals to visit.
(It is extremely unusual for any race other than Deities to be found up here. If they are it should be for a very, VERY, good reason.)