Yes, it does depend on when you will be there. Before the grand opening, due to the construction, Guest Relations is in a trailer. When you enter DCA, everyone is funneled to the right, behind Soarin. About a quarter of the way down this path, there is a trailer on your left. That is Guest Relations.
After the remodel, I believe Guest Relations will be in its old spot, directly on your left as you enter the park. A CM I spoke to recently said she thought it was going to be called City Hall or Town Hall.