Emulators - bobbae/gcp GitHub Wiki
Local development with Local Emulator Suite can be a good fit for your prototyping, development and continuous integration workflows.
https://cloud.google.com/sdk/gcloud/reference/beta/emulators
Emulator Suite
https://firebase.google.com/docs/emulator-suite/connect_and_prototype
Firebase
https://firebase.googleblog.com/2021/07/the-cloud-storage-for-firebase-emulator.html
Using Firebase emulator
Firestore emulator
https://firebase.google.com/docs/emulator-suite/connect_firestore
Using GCP Firestore emulator for local Go App development
Pub/Sub emulator
https://cloud.google.com/pubsub/docs/emulator
Spanner emulator
https://cloud.google.com/spanner/docs/emulator
Bigtable emulator
https://cloud.google.com/bigtable/docs/emulator
Datastore emulator
https://cloud.google.com/datastore/docs/tools/datastore-emulator