Hi Kwik, Your Graycie reminds me a lot of my Bob (the) Cat. He was a random stray listed as domestic shorthair but looks very much the similar. Bob who just turned one year old, unlike your Graycie is quite bold, he likes to howl when he really wants something.
Looks a lot like Bob, he had what looked like tabby markings when he was a small kitten. The other pictures are him at around 9 months and those markings are gone. Apart from some slightly dark stripes on his tail.