As of now geolocation push notifications are only supported by Apple Wallet and a maximum of 10 locations.
Pan and zoom the map and click the location where you want to create a geolocation push notification. The notification will show up when the user is +/- 100 meters. You can choose up to 10 different locations. You can update or delete a location anytime you want, by simply clicking the dot and then "Delete".
Related
Sending Push Notifications
All you need to know about sending push notications.
Push Notifications on Apple/Google Wallet
Push notification similarities and differences for Apple Wallet and Google Wallet.
Community
How to use the Community page, the place you find all member cards.