Hopefully not mate, luck of the draw, VW might have had a few older gateways in the parts box when making your one, or put a newer one in... Anyone local could VCDS scan to check the revision for you?
As for fitting the RNS, it will be easy, I did mine last night in the dark with just a headtorch and it took about 20 minutes just take your time and it'll be fine.
If you have the 2 connectors, it doesn't matter which way round they go in the aerial slots for the RNS
Let us know how you get on...