From NexusWiki

Gate can refer to two different meanings, first the spell called "Gate" which is a spell that teleports you to the East, West, North, or South gate of the area you are currently in.

The second is the actual gates themselves. Such as East Gate refers to the eastern gate of a city such as Kugnae or Buya. These gates are also typically used as places to stand around chatting or socializing, also many have important features nearby such as East Gate Buya which is directly in front of the Buya Carnage Hall.