write the GCP tutorial

Author: jordanstephens

docs/tutorials/deploy-to-gcp.mdx

@@ -6,9 +6,39 @@ sidebar_position: 11
 
 # Deploying to Google Cloud Platform (GCP) With Defang
 
-This tutorial is coming soon.
+This tutorial will show you how to deploy your services to your own AWS account using Defang.
 
----
+## Pre-requisites
+* [A Dockerfile in your project](https://docs.docker.com/get-started/docker-concepts/building-images/writing-a-dockerfile/)
+* [A `compose.yaml` file in your project](https://docs.docker.com/compose/gettingstarted/)
+* [A Defang Account](/docs/concepts/authentication)
+* [The Defang CLI](/docs/getting-started#install-the-defang-cli)
+* [GCP Account Credentials](https://cloud.google.com/docs/authentication)
 
-For a deeper discussion of the Defang GCP Architecture, see our [GCP docs](/docs/providers/gcp).
+## Step 1 - Navigate to your project directory
+Head to the folder where your project is located.
+```bash
+$ cd path/to/your/project
+```
+
+## Step 2 - Authenticate Defang to use your GCP Account
+
+After signing up for your GCP account, select an existing project or [create a new project](https://developers.google.com/workspace/guides/create-project). Make sure [billing is enabled](https://cloud.google.com/billing/docs/how-to/modify-project). Then, note down the project ID and set it as environment variable `GCP_PROJECT_ID`.
+
+## Step 3 - Deploy
+
+Invoke the `defang up` CLI command with the `--provider=gcp` flag or set the `DEFANG_PROVIDER=gcp` environment variable.
 
+For example:
+
+```bash
+$ defang up --provider=gcp
+```
+
+## Step 4 - Inspect your deployment
+
+Defang will provision resources in your GCP account and deploy your services. You can inspect the resources created in your GCP dashboard.
+
+***
+
+For a deeper discussion of the Defang GCP Architecture, see our [GCP docs](/docs/providers/gcp).