Time to Upgrade from GCM to FCM- Google Developers Blog

What this post added

This post announces the deprecation of Google Cloud Messaging (GCM) and the migration to Firebase Cloud Messaging (FCM). It details the timeline for GCM deprecation and provides guidance for developers to migrate their existing GCM implementations to FCM. The post emphasizes that FCM is the recommended solution for sending messages to client apps on Android, iOS, and the web, offering a unified platform and improved reliability.