As far as I know it is not possible, I believe Google builds that text based upon the redirect_uri. I would assume you'd only see the fusionauth.io domain listed if you're using our hosted URL. If you are using an enterprise plan with a custom domain (login.example.com) you shouldn't see fusionauth.io mentioned.

I know in the Google cloud console where you configure your credentials there is a customization option for the consent screen, but I do not know if that will modify this account chooser or not.