Quote Originally Posted by Bowells View Post
I was always under the impression that as long as it can be put in a macro in-game and function then it's allowed and anything else is not.
That seems like it would be a good general rule of thumb, but there's never been any blue post that I am aware of saying anything like that. You probably think that because anything not on the GCD can all be placed in the same macro and perform all with one click. But two things on the GCD cannot be macroed to cast at the same time.

The movement keys are not on the GCD and can be used at the same time as other abilities without any problems at all. Running while shooting as an example. Nothing wrong with that at all.