lol I know it might seem a Bit out there because it kinda is but the dude clearly doesn't react normally in social situations even when he isn't in formal business meetings and such.

even when talking with people who he's known on a personal level for years and of course even his own son he's cold and hardly shows emotion except for when its strong enough that it comes through like whenever he's upset and angry.

plus I know grief can do crazy things to a person but his obsession with his wife feels like a case of getting attached to someone more so then a normal partner would and Besides Natalie he doesn't really have any one he's close with outside of his small family circle.

its not much I know but its just kinda the impression I always got from him plus I used to work as an assistant at a special needs school and Gabe kinda reminds me of a kid there he was always very formal stoic even with his own parents and actually pretty mature for his age.