diff --git a/README.md b/README.md
index cdb4c3e09..70d82d601 100644
--- a/README.md
+++ b/README.md
@@ -167,6 +167,8 @@ go to the [Gemini Assistant workflow documentation](./examples/workflows/gemini-
 
 -   <a name="__input_gemini_api_key"></a><a href="#user-content-__input_gemini_api_key"><code>gemini_api_key</code></a>: _(Optional)_ The API key for the Gemini API.
 
+-   <a name="__input_gemini_cli_package"></a><a href="#user-content-__input_gemini_cli_package"><code>gemini_cli_package</code></a>: _(Optional, default: `@google/gemini-cli`)_ The package name of the Gemini CLI to install.
+
 -   <a name="__input_gemini_cli_version"></a><a href="#user-content-__input_gemini_cli_version"><code>gemini_cli_version</code></a>: _(Optional, default: `latest`)_ The version of the Gemini CLI to install. Can be "latest", "preview", "nightly", a specific version number, or a git branch, tag, or commit. For more information, see [Gemini CLI releases](https://github.com/google-gemini/gemini-cli/blob/main/docs/releases.md).
 
 -   <a name="__input_gemini_debug"></a><a href="#user-content-__input_gemini_debug"><code>gemini_debug</code></a>: _(Optional)_ Enable debug logging and output streaming.
@@ -218,6 +220,7 @@ We recommend setting the following values as repository variables so they can be
 | Name                        | Description                                                                                                                    | Type     | Required | When Required                  |
 | --------------------------- | ------------------------------------------------------------------------------------------------------------------------------ | -------- | -------- | ------------------------------ |
 | `GEMINI_DEBUG`              | Enables debug logging for the Gemini CLI.                                                                                      | Variable | No       | Never                          |
+| `GEMINI_CLI_PACKAGE`        | Controls which package of the Gemini CLI is installed.                                                                         | Variable | No       | Custom CLI package             |
 | `GEMINI_CLI_VERSION`        | Controls which version of the Gemini CLI is installed.                                                                         | Variable | No       | Pinning the CLI version        |
 | `GCP_WIF_PROVIDER`          | Full resource name of the Workload Identity Provider.                                                                          | Variable | No       | Using Google Cloud             |
 | `GOOGLE_CLOUD_PROJECT`      | Google Cloud project for inference and observability.                                                                          | Variable | No       | Using Google Cloud             |
diff --git a/action.yml b/action.yml
index 7eccaf14b..df0610539 100644
--- a/action.yml
+++ b/action.yml
@@ -41,6 +41,10 @@ inputs:
   gemini_api_key:
     description: 'The API key for the Gemini API.'
     required: false
+  gemini_cli_package:
+    description: 'The package name of the Gemini CLI to install.'
+    required: false
+    default: '@google/gemini-cli'
   gemini_cli_version:
     description: 'The version of the Gemini CLI to install. Can be "latest", "preview", "nightly", a specific version number, or a git branch, tag, or commit. For more information, see [Gemini CLI releases](https://github.com/google-gemini/gemini-cli/blob/main/docs/releases.md).'
     required: false
@@ -236,6 +240,7 @@ runs:
     - name: 'Install Gemini CLI'
       id: 'install'
       env:
+        GEMINI_CLI_PACKAGE: '${{ inputs.gemini_cli_package }}'
         GEMINI_CLI_VERSION: '${{ inputs.gemini_cli_version }}'
         EXTENSIONS: '${{ inputs.extensions }}'
         USE_PNPM: '${{ inputs.use_pnpm }}'
@@ -247,14 +252,15 @@ runs:
       run: |-
         set -euo pipefail
 
+        PACKAGE_NAME="${GEMINI_CLI_PACKAGE:-@google/gemini-cli}"
         VERSION_INPUT="${GEMINI_CLI_VERSION:-latest}"
 
         if [[ "${VERSION_INPUT}" == "latest" || "${VERSION_INPUT}" == "preview" || "${VERSION_INPUT}" == "nightly" || "${VERSION_INPUT}" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9\.-]+)?(\+[a-zA-Z0-9\.-]+)?$ ]]; then
-          echo "Installing Gemini CLI from npm: @google/gemini-cli@${VERSION_INPUT}"
+          echo "Installing Gemini CLI from npm: ${PACKAGE_NAME}@${VERSION_INPUT}"
           if [[ "${USE_PNPM}" == "true" ]]; then
-            pnpm add --silent --global @google/gemini-cli@"${VERSION_INPUT}"
+            pnpm add --silent --global "${PACKAGE_NAME}@${VERSION_INPUT}"
           else
-            npm install --silent --no-audit --prefer-offline --global @google/gemini-cli@"${VERSION_INPUT}"
+            npm install --silent --no-audit --prefer-offline --global "${PACKAGE_NAME}@${VERSION_INPUT}"
           fi
         else
           echo "Installing Gemini CLI from GitHub: github:google-gemini/gemini-cli#${VERSION_INPUT}"
diff --git a/examples/workflows/gemini-assistant/gemini-invoke.yml b/examples/workflows/gemini-assistant/gemini-invoke.yml
index c549de614..3a0da4cf8 100644
--- a/examples/workflows/gemini-assistant/gemini-invoke.yml
+++ b/examples/workflows/gemini-assistant/gemini-invoke.yml
@@ -58,6 +58,7 @@ jobs:
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
+          gemini_cli_package: '${{ vars.GEMINI_CLI_PACKAGE }}'
           gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
           gemini_debug: '${{ fromJSON(vars.GEMINI_DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'
diff --git a/examples/workflows/gemini-assistant/gemini-plan-execute.yml b/examples/workflows/gemini-assistant/gemini-plan-execute.yml
index b8796c217..020a9b33e 100644
--- a/examples/workflows/gemini-assistant/gemini-plan-execute.yml
+++ b/examples/workflows/gemini-assistant/gemini-plan-execute.yml
@@ -60,6 +60,7 @@ jobs:
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
+          gemini_cli_package: '${{ vars.GEMINI_CLI_PACKAGE }}'
           gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
           gemini_debug: '${{ fromJSON(vars.GEMINI_DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'
diff --git a/examples/workflows/issue-triage/gemini-scheduled-triage.yml b/examples/workflows/issue-triage/gemini-scheduled-triage.yml
index 8636cf7ab..2b7d549db 100644
--- a/examples/workflows/issue-triage/gemini-scheduled-triage.yml
+++ b/examples/workflows/issue-triage/gemini-scheduled-triage.yml
@@ -104,6 +104,7 @@ jobs:
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
+          gemini_cli_package: '${{ vars.GEMINI_CLI_PACKAGE }}'
           gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
           gemini_debug: '${{ fromJSON(vars.GEMINI_DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'
diff --git a/examples/workflows/issue-triage/gemini-triage.yml b/examples/workflows/issue-triage/gemini-triage.yml
index 480a2b0d6..27405e1c2 100644
--- a/examples/workflows/issue-triage/gemini-triage.yml
+++ b/examples/workflows/issue-triage/gemini-triage.yml
@@ -71,6 +71,7 @@ jobs:
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
+          gemini_cli_package: '${{ vars.GEMINI_CLI_PACKAGE }}'
           gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
           gemini_debug: '${{ fromJSON(vars.GEMINI_DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'
diff --git a/examples/workflows/pr-review/gemini-review.yml b/examples/workflows/pr-review/gemini-review.yml
index 58196b1f2..0b37d7596 100644
--- a/examples/workflows/pr-review/gemini-review.yml
+++ b/examples/workflows/pr-review/gemini-review.yml
@@ -58,6 +58,7 @@ jobs:
           gcp_service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
           gcp_workload_identity_provider: '${{ vars.GCP_WIF_PROVIDER }}'
           gemini_api_key: '${{ secrets.GEMINI_API_KEY }}'
+          gemini_cli_package: '${{ vars.GEMINI_CLI_PACKAGE }}'
           gemini_cli_version: '${{ vars.GEMINI_CLI_VERSION }}'
           gemini_debug: '${{ fromJSON(vars.GEMINI_DEBUG || vars.ACTIONS_STEP_DEBUG || false) }}'
           gemini_model: '${{ vars.GEMINI_MODEL }}'