@Cristos: I did several FileMaker/Google Analytics implementations back in 2010, and even presented in one of Filemaker's webinars on the topic.
Details about how I ended up doing so can still be found on our website I believe:
Of course, this is even older than the material that you were already looking at, so it doesn't help you in that regard.
I had to use a number of different technologies to get my system to be fully automated, and that presented a number of different technical hurdles that varied from platform to platform.
Once it was up and running however, it took care of it self rather nicely.
~ Matthew Leering