I just want to make sure I understand your question - are you asking if my Avia I disc has the grayscale test patterns on it, or are you asking if I, as a consumer, am able to make adjustments to my grayscale and RGB cuts in my TV?
I am thinking you meant am I able to use my Avia I disc's grayscale patterns, to which I would reply I am 75% sure that I was able to do so, however I have to tack on a disclaimer to that, I haven't used this disc in almost 5 years... so I will look at it tonight or tomorrow and get back to you.
I don't want to give a definite answer to you without being sure.