I just typed up my reply and closed the tab, lol. -_-
I collect mine in my museum exhibits. Exhibit room 1 is for gyroids I don't have any matches for, room 2 is for pairs, room 3 is for completed sets of 3, and room 4 is for completed sets with more than three gyroids. It's a sacrifice if you actually like to use your exhibits, but I don't have any other uses for them at the moment!