I've finally reached a decision to keep the group uniquely "Grimmjow-only" as most of you say, and some of you do indeed have a point there that there are (certainly) other Grimmjow groups that accept pairings anyways. But, general non-pairing related mixed group pics featuring Grimmjow together with one or more canon Bleach characters are (still) allowed. Crossovers are accepted too provided that it's not some anime character basically dressed up as Grimmjow, if you know what I mean. I could have created a separate folder specifically for group-related works but I don't want newbies or people who couldn't be bothered to read the guidelines to assume it extends to pairings as well when it does not, thus there will not be any additional change to the gallery for now (we will update you if any).
[General Grimmjow groups that accept (almost) anything]
[Resurreccion & adjuchas form only]
Thanks again for the feedback everyone! Oh, and I'm still not sure on the suggestion of having pairings only in the the group's +favourites in a separate folder *rubs imaginary beard thoughtfully*