DeMignon: Thanks peeps. Has GOG shown these ratings before? I only realized them with the release of Army Men and apparently they're still waiting for Brazil's rating. So there might be another symbol added in the future, since Brazil seems to have its own rating system.
ssokolow: I'm pretty sure I've seen them at least once before, but I can't remember where. I already own most of GOG's catalogue and tend to buy what remains through either the sale checklists or insomnia sales, so I don't visit the store pages very often.
Must be rare though, at least at the moment, since they're just an image uploaded on items.gog.com, and a single image for all 3 at that, without even a class or id of their own where they're placed, reusing the style for EULA requirement texts. Above them you can see fields and entries for ESRB and USK, though they're not displayed, but these don't have such fields at all.