We now allow you to add query filters when connecting a Google Search Console data source. This has been requested from our users and will help you get an accurate data set and be able to filter out data that you don't wish to have in Funnel.
Note that you need to connect a new Google Search Console data source in order to use the filter functions. You can read more about dimensions you can filter on and what operators are available in the What data can I get from Google Search Console? or reach out to firstname.lastname@example.org and we help you out!