Geofence alert implementation

Implementing the geofence alerts/notification for website as well as app.
1) Our website and app is ready in angular 14 and java spring boot.
2)We have google maps api integrated.
3)We need to add geofence with alert and notification to website and app.
4)Due to confidentiality customer will not share code for app and website.
5)We can develop stand alone geofence plus alerts/notification.
6)Geofence can we need to support is of mixture of circle, polyline and line.

Looking for Priority implementation.