I'm working on a unit test project in Visual Studio 2012 for an ASP.NET MVC 4 web application.
The solution has 3 projects:
What you are describing is not really a unit test. A unit test should not relay on external resources.
When you say "I managed to mock
GetGlobalResourceObject method", I assume that you are working with HttpContextBase.GetGlobalResourceObject (accessible in your controller).
So, for unit test purposes, you don't need any resx files. Just setup the proper calls on that mocked method, so it returns whatever is needed.