There's no cg gallery because the game is pure CG haha! It would be extremely long, very tedious to code and would make the game unnecessarily heavy, but you can see the full CGs by just pressing H!
i understand its tedious and i did know about hiding the dialogue but its also tedious to go back and forth to sc a cg as well + a lot of people would appreciate a cg gallery since your art is literally gorgeous im not saying you should drop everything to add but would be a nice addition tho