localgcp

LocalStack for GCP. One Go binary emulating 14 Google Cloud services locally: Vertex AI, BigQuery, Spanner, Firestore, Pub/Sub, Cloud Storage, Bigtable, Cloud SQL, Memorystore, Cloud Tasks, KMS, Secret Manager, Cloud Run, Cloud Logging. Zero cloud bills. Maintained by slokam-ai on GitHub, where it has earned 59 stars from the community.

It's actively developed around bigquery, bigtable, cloud-kms, and is a solid reference for anyone building with these tools.