Yep, the LED's I purchased for the Scirocco (that are now in the Golf) were not CAN Bus friendly, and they are working perfectly with no flickering or bulb warnings etc.
I do agree however that the footwell lights as well as the front sidelights and number plate lights were all monitored by the CAN Bus. Good job then on the GTI/GTD's that the footwell lights are already LED, the number plates lights are LED, and we don't have separate sidelights, but an LED and the main DRL in the headlights.