I thought I made some serious headway there today. My script works perfectly fine when run from a Python Shell, but in ArcMap, whether the script is run from the Python Command line, or within a toolbox, GME fails/produces an error when loading. Another person is experiencing the identical behavior and has a thread started on the ESRI Forums.
Here is a screenshot of his error, my OS seems to cut off more of the error:
Has anyone else experienced this error? Are you able to execute GME commands from within an ArcMap session? There is only one config file which, while related to logging, I don't believe has any bearing on this. I'm not aware of any other switch when you execute GME from a command line which disables logging.