FYI (and not sure if its related), when powered on, the camera will do its "Clean Sensor" routine where it uses sonic waves to slightly vibrate the sensor for dust removal. I don't feel it, but I can sometimes hear a high pitched squeak when using "clean sensor" from the menus.
No, I'm running v1.2 but didn't remember an unusual vibration prior my upgrading. Was playing with a friend's new OMD 10 and man, does that thing whirr when the stabilization kicks into gear! I'll check my GX7 when I get home.