But he falls off of his chair almost every day (this is seriously not an exageration) because he can't just sit and eat a meal...
I am not sure that forgetfulness is related to GT but I do agree that WYSI NOT WYG with these kids. In other words, they have lots of thoughts swirling through their heads and can't always focus on the task at hand.
DS8 has been a nightmare at dinner for the past few years. He can't sit still, can't sit up straight, slouches, slumps, eats a bite then gets up and runs around seeking something, etc. This often occurs outside of the home too at restaurants or other people's houses. I wish I could say he's getting better but... We have learned that eating just isn't that important to him. He'd rather be doing a million other things. Interestingly (yes, sometimes the enabling occurs but it is DH more than me: I refuse to hand feed him hence the 60-75 minute dinners), he loves to read and would eat almost anything while reading if we feed him! He's had some food texture issues in the past as well as dislike of getting his hands dirty (almost all have been overcome) so sometimes, we do give in and feed him.
I can see how some of his behaviors could be misconstrued as ADHD. We certainly had a few sensory issues when he was younger which thankfully have diminished as he's aged. I don't know if his inherent restlessness is due to GT or he's just programmed that way. My Mom recently commented that she's observed other people's kids behaving perfectly but rarely sees mine sitting still. Don't know how to take that one...
Thanks for letting me share