I'm wondering if there are any API's to import audiences into the audience library from a source like for example google analytics (360).
As a client of mine is using google analytics and would like to re-use their segments in the adobe experience cloud, i'm investigating possible options other then suggestion to migrate to Adobe Analytics to have the integrated adobe experience cloud features.
Good question if you have access to Adobe Audience Manager (Experience Cloud Data Management Platform), there are multiple methods on how to get data into Audience Manager please see here
Specifically, Client Side DIL which discusses collecting custom attributes from Google Analytics.
Hope this helps 😀