Any idea how to achieve this: On the parent category pages, there is a grid display of the subcategories with their category title, image, description and link.
Sure, it’s quite a bit of customization but I’d like to achieve it with GeneratePress.
You can see from the menu that Cycles is a page with three dropdown tabs that are categories that are actually subcategories of a parent category also called Cycle. I’d like to use the category page rather than a static page to display the three subs. I’d like it to be automatic so that every parent category page does that.
That would involve some decent customization to the category page template. You’re likely better off using the static page approach – it gives you much more control.
We use archives.php, which works for categories as well as other archive pages. You can use archives.php as well, or use category.php which is more specific.