Screenshots? Of at-best nearly-illegible handwriting? I grok your reasons for asking, but most of the time when the camera is on the notebook, instead of pointed at Tim, Tim is flipping through the pages in a fast blur. There's not a whole lot to see.
There's a possibility that there may more GF history to come. The latest video was of Tim beginning to replay Day of the Tentacle (in ScummVM). The DFA game development is going to take quite a while, so maybe it's possible that at some point there will be videos of Tim replaying Grim Fandango. I'm just guessing about that, obviously.