I can't find this game unless I go to the game page through my library where I have it.
Anyone else?

Yes, same thing - searching with or without the periods fails to find these games.

Have you contacted GOG about it? I believe you should.

Same here and it is not the only game on which this happens. So, the normal procedure about this stuff is to contact GoG support?

Considering the amount of time passed since the previous posts, it does not look like something they care about fixing, though.