Tao Gung Fu

From what I found on google this seems to be based off Bruce Lee's work, 'The Tao of Gung Fu', however it is my understanding that this work is meant to give understanding on kung fu, rather than being a framework for a martial arts form.

(I can't post a link since I need at least 5 posts)
Website can be found by searching hornsby Tao Gung Fu

Is it a legit form? or should it be avoided?

Thanks in advance, any other thoughts or ideas shared would also be appreciated.