User blog comment:Ieatrice/New Image Galleries Available in Labs/@comment-184543-20141024150844/@comment-452-20141030200641

You are correct, Darth Daron. I do not know why a "Councilor" would give you incorrect information like that.

Wikia Staff enable some "stable" extensions by request. (I am currently unaware of any "beta" extensions that have been enabled, but it is possible that there are some - from memory alone, the majority of extensions I have requested which have not been enabled have been "beta" extensions.)

Your best course of action at this time is to ask Wikia Staff via Special:Contact whether that extension can be enabled, and to ask if there are similar extensions available.

If there aren't, I have a feeling that DPL could do what you describe. Wikia Staff enable this extension upon request... and a promise that you will try to not overload the servers, so be sure to read up on cache parameters.