Damn should have waited 30 more minutes before posting.
My main problem that I connected the radio as described here http://tmrh20.github.io/RF24/ which puts the CE pin in the "wrong" location for PiGatewaySerial. After fixing that I started getting node id requests etc.
@mfalkvidd said:
It works with Domoticz. See http://forum.mysensors.org/topic/2437/step-by-step-procedure-to-connect-the-nrf24l01-to-the-gpio-pins-and-use-the-raspberry-as-a-serial-gateway section "Enable the gateway for use with Domoticz"
Cool solution, however I did something different as I hadn't seen this before digging in. In short I noticed the domoticz.db file. In my experience that usually means sqlite. So I opened it in a sqlite browser and started digging, found the plugin config and manually pointed it to the correct location and started domoticz again. Bit dirty I know but works like a charm.
@mfalkvidd said:
That is the data format, not the debug log format of the node right?
Thanks a lot for your help. Very nice to be at a point where you have a working vertical slice(controller <-> gateway <-> sensor) of the setup! 
