I'm not sure there is a correlation between Flylady and GF. I've not subscribed to Flylady (put off by the stories of the deluge of e-mails) but I do look every so often at what zone she is covering. it is precsiely because I AM disorganised, but wanting to be get some space for myslef, that I do find some of her principles useful.
I too have been trying to do the 15 minute blitz on a room at time - haven't managed to do it every day, but even every so often is still better than nothing. And I have been trying to keep my kitchen (and the sink!) clean and tidy every night - it makes such a difference going in to a tidy kitchen in the morning!
I also liked the way she re-iterates that it takes 28 days to establish a routine - so every time I relapse I don't feel too bad. My house is now generally more peresentable - I don't panic at the thought of people visiting, even if it's not always as tidy as I would like.