I was talking to someone earlier today who wanted to make a GOC goi format, despite the fact that there already is one. After I checked the GOC combined canon hub/goi hub, I realized why they weren't aware.
The hub doesn't link to any GOC content aside from some years old tales by Clef and Spikebrennan. All the other GOI hubs contain content lists containing the skips, tales, and, if the format for said goi exists, goi format articles for that GOI. GOIs with formats also usually have it as part of the hub via a style guide/template. The GOC page apparently had a style guide (or was planned to) at one point, but the link on the page that supposedly leads to it is dead.
In order to bring this up to standards with the other GOI hubs, I propose the following:
1. Adding a tab that contains modules that display the skips and tales tagged with GOC.
2. Featuring the GOC GOI formats prominently somewhere on the page.
3. Adding a tab that has the GOC format style template.
Aside from that, how exactly would you all like to implement this? The odd triple tab tiered organization of the GOC hub and its status as a dual GOI hub/Canon hub makes these changes more complicated than they should be since there are multiple places they could go. Maybe changing the organization a bit so that the bottom tab row has all the old canon-relevant stuff while the top row gets the GOI hub essentials and masterlist?