Gatsby/Ghost how to modify a page in Gatsby that was generated from Ghost

Hey,

I created a “tags” page in ghost and using code injection, injected a little bit of code so that all tags created would be listed on that page as links.

Because of a known issue https://github.com/TryGhost/gatsby-starter-ghost/issues/22 when you build the site with gatsby the script I injected doesn’t work and the page is blank.

I would like to modify that page in gatsby so it works correctly. Since the content of the page comes from ghost all I could find is the page in graphQL.

query MyQuery {
  allGhostPage {
    totalCount
    nodes {
      id
      html
      title
    }
  }
}

Can I just modify it? I searched but all I could find was this https://spectrum.chat/gatsby-js/general/executing-apollo-mutations-when-creating-pages~9d9669b4-8a3a-472c-90f9-f731cefa37e6

Is there a better way to be doing this?