From what I understand about why gematria shows up here (which I'm very fuzzy about)

Gematria and a whole bunch of other ciphers are used by the cabal to encode hidden information.

And I'm sure someone will correct me if I'm wrong.

I believe Q taught people how to use and research information using many of the techniques and ciphers the cabal uses.(If that makes sense)

So i wasn't around when the Q drops were coming down but I sorta pieced together that all the Q drops are interlaced with all sorts of clues if you use gematria, time of post, post number, numerology(?), and a few others I can't remember off the top of my head.

Now mind you I also believe that there is a lot of false positives baked into Q drops to scramble the signal of information.
Afterall you can tell the enemy your attacking, but you should never tell them how you will attack.

As for how gematria works I believe there should be information somewhere on this site, if it's not on the sidebar check the search feature.
Quite fascinating really.