I have the exact same issues, including the worry that DS4 (2nd child behind HG+ DS7) might have a learning disability that we don't recognize. But it's just as likely that he's differently GT than DS7 or not GT at all. I just can't tell yet. He's also highly imaginative and verbal, whereas his big bro is very analytical and pattern-oriented.
We're in wait-and-see mode. I definitely plan to have him tested, and I watch for LDs and signs of something being wrong. But so far, I can't tell.
I guess that's my way of saying "I know how you feel!" And to answer your question, there's a good chance that your DS2 is GT in some form, though there's no guarantee.
Anyway, you found a good place to hang out whie you wait until you can do the testing.
Welcome!
