It’s not difficult at all to install GOG games on the steam deck. The games that typically show up in GOG aren’t bleeding edge and tend to work well with its limited hardware. If you understand that a steam deck has a “console” mode and a “desktop” mode… I don’t get the source of the confusion.

It’s a pc. You’re good.

Passively displaying any stuff is the holy grail, but we get there step by step.