A transceiver plugged into one of the cameras, setting "TX" and the Yongnuo YN-560 Mark III flash can be controlled clean. The second transceiver as a receiver in a strange flash I could not test, because I only have a flash.
The Fernauslösekabel does not work as described on the GX7.
At the K-50 it works flawlessly. The cable in the remote release socket on the camera and insert a transceiver, setting both "TRX" she blinking green and triggering works incl. Autofocus. For this, the wired transceiver must not get stuck in the accessory shoe (at the K-50 connectors are somewhat impractical: the camera right, left on the transceiver, the cable run a bit annoying).
If you want to drive with this setup the above flash, so the wired transceiver must insert the accessory shoe, then it works also.
A practical combination, not cheap, but affordable. For my amateur needs, mostly mini-studio recordings, of totally satisfactory quality.
Update 16/12/2014
1. Works with the Olympus OM-D E-M1 (also only flash control, no remote activation).
2. In addition to the now tested Nissin Di 466 for MFT as a radio flash to be triggered: a transceiver in the hot shoe of the camera (setting TX), placed on the other the flash (setting TRX, the flash: M) - works fine.
