Integrating Google Cloud (G Cloud) with GitHub can be done through several methods, each offering specific functionalities and benefits.

1. Using GitHub Actions for G Cloud: The setup-gcloud GitHub Action is designed to install and configure the gcloud CLI within the GitHub Actions environment. This setup includes both the gcloud and gsutil binaries. The action requires Google Cloud credentials to execute gcloud commands and supports features like Workload Identity Federation, service account key JSON, and Application Default Credentials. Additionally, it allows for specifying multiple service accounts, Cloud SDK versioning, and installing additional Cloud SDK components​​.

2. Collaboration Between Google Cloud and GitHub: Google Cloud and GitHub have collaborated to integrate GitHub with Google’s Cloud Build, a CI/CD platform. This integration aims to provide a seamless and efficient Continuous Integration (CI) experience directly within the GitHub workflow. The collaboration includes features like zero-config Docker builds, scalability, security, and flexibility for advanced use cases through a cloudbuild.yaml file. This file enables custom build steps, caching Docker images, building leaner containers, and deploying directly to various Google Cloud services or other cloud providers​​.

3. Google Cloud Platform (GCP) CLI – gcloud GitHub Action: This GitHub Action allows for interacting with Google Cloud Platform using the gcloud CLI. It includes usage of gsutil and kubectl from the Google Cloud SDK package. The action provides options for using service account keys for authentication, setting project IDs, and using access tokens for authorization with Workload Identity Federation. The action supports specifying command arguments and selecting the command-line tool to use (gcloud, gsutil). It also accommodates different versions of the gcloud CLI​​.

These integration options between G Cloud and GitHub offer a range of functionalities, from basic CLI interactions to more advanced CI/CD integrations, catering to various development and deployment needs.