Correct plural of FAQ

IMHO "FAQs" is more natural. Consider if a page referred you to their FAQ. You (I) might think "What? Only one FAQ?". So adding the "s" makes sense to me.

Also, being pedantic, FAQ is not an acronym: It is an initialism. Acronyms are pronounceable words comprised of a set of initial letters, such as the word "laser".

G

A FAQ is a collection of Frequently Asked Question(s) for a specific topic.

FAQs are a collection of multiple lists of FAQ.

“I looked up a Fallout4 FAQ on GameFAQs”

I disagree that FAQ always stands for Frequently Asked Questions; a single question that is frequently asked is also a frequently asked question, or FAQ. Thus, a list of such questions is a list of FAQs.

While the acronym does indeed stand for Frequently Asked Questions, in many cases, there is an implied list of (or perhaps document containing) in the acronym's usage, which is why it's treated as a singular object. For example, I could have a FAQ that covers home buying and a separate one that has questions regarding home purchasing. In this case, I might suggest that you check out the FAQs, meaning The lists of frequently asked questions.

In this case, I see nothing wrong with adding an s to pluralize the implied list (making it clear there there are multiple sets).

However, I would suggest that if you have a single list, and the s merely refers to the fact that multiple questions exist, the s is not needed.