diff --git a/packages/cli/package.json b/packages/cli/package.json
index 4deb48c7..1ec0ea0b 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openrouter/spawn",
-  "version": "0.10.4",
+  "version": "0.10.5",
   "type": "module",
   "bin": {
     "spawn": "cli.js"
diff --git a/packages/cli/src/gcp/gcp.ts b/packages/cli/src/gcp/gcp.ts
index 5476c290..81df9f81 100644
--- a/packages/cli/src/gcp/gcp.ts
+++ b/packages/cli/src/gcp/gcp.ts
@@ -673,6 +673,9 @@ export async function createInstance(
     `--machine-type=${machineType}`,
     "--image-family=ubuntu-2404-lts-amd64",
     "--image-project=ubuntu-os-cloud",
+    `--network=${process.env.GCP_NETWORK ?? "default"}`,
+    `--subnet=${process.env.GCP_SUBNET ?? "default"}`,
+    `--subnet-region=${zone.replace(/-[a-z]$/, "")}`,
     `--metadata-from-file=startup-script=${tmpFile}`,
     `--metadata=ssh-keys=${sshKeysMetadata}`,
     `--project=${gcpProject}`,
diff --git a/sh/gcp/README.md b/sh/gcp/README.md
index 6de10b37..98a03f08 100644
--- a/sh/gcp/README.md
+++ b/sh/gcp/README.md
@@ -49,3 +49,20 @@ GCP_INSTANCE_NAME=dev-mk1 \
 OPENROUTER_API_KEY=sk-or-v1-xxxxx \
   bash <(curl -fsSL https://openrouter.ai/labs/spawn/gcp/claude.sh)
 ```
+
+## Custom VPC / Subnet
+
+If your GCP project's default VPC uses **custom subnet mode** (common in enterprise or org-managed projects), set these env vars to override the default network/subnet:
+
+| Variable | Default | Description |
+|---|---|---|
+| `GCP_NETWORK` | `default` | VPC network name |
+| `GCP_SUBNET` | `default` | Subnet name |
+
+Example:
+```bash
+GCP_NETWORK=my-vpc GCP_SUBNET=my-subnet \
+GCP_INSTANCE_NAME=dev-mk1 \
+OPENROUTER_API_KEY=sk-or-v1-xxxxx \
+  bash <(curl -fsSL https://openrouter.ai/labs/spawn/gcp/claude.sh)
+```