Use GCM Token for push messages in FCM

Question

Currently we have devices using old GCM implementation.

Does anyone know if it\'s possible to use old existing GCM tokens when sending push messages using firebase c

Answer 1

Yes we can use GCM token to push on FCM. See the below explanation:

Your GCM and FCM registration tokens are mutually interchangeable; you can send to existing GCM tokens through the FCM HTTP server APIs.

https://developers.google.com/cloud-messaging/faq