Unfortunately, it’s not possible to import data from Google Analytics to Piwik PRO. But, you can do the following:
- Migrate your settings from GA3/GTM and start collecting data in Piwik PRO.
- Use BI tools such as Looker Studio, Power BI (desktop) or Power BI (service) to combine data from GA 3 and Piwik PRO. You’ll need to import data from GA3 and then import data from Piwik PRO.