Migrating GCM to FCM, should/could I keep my current GCM server side of code?

Question

I\'ve been using GCM service to send notification to my existing App, in PHP server, as per https://stackoverflow.com/a/11253231/3286489.

Now I\'m thinking of migrat

Answer 1

The answer to both is Yes.

For #1, my post that you linked pretty much answers it. So just to confirm, using the FCM endpoint to send towards your GCM users should be fine. It's still compatible.

For #2, no need to send separate payload for GCM users. As I said above, it is backwards compatible.