you can.. though, honestly, i'd advice against wordpress + gatsby. in my experience, because of various plugins required to do various things, the way media is fetched etc, and the highly difficult task of getting things working with schemas in wp.

also, wordpress builds tend to also take the longest.

if you enjoy hacking on wordpress and debugging weird issues, then this might be a good choice.

It's much easier to build a blog using prismic, contentful, or even the netlify cms kind of is nice for a basic "serverless" blog/cms.

honestly, i'd take markdown files in a bunch of folders any day over gatsby-source-wordpress.