diff --git a/build/Makefile b/build/Makefile
index f4b573ca14..cf4c4ff7e2 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -70,7 +70,7 @@ GS_TEST_IMAGE ?= us-docker.pkg.dev/agones-images/examples/simple-game-server:0.3
 BETA_FEATURE_GATES ?= "CountsAndLists=true&DisableResyncOnSDKServer=true"
 
 # Enable all alpha feature gates. Keep in sync with `false` (alpha) entries in pkg/util/runtime/features.go:featureDefaults
-ALPHA_FEATURE_GATES ?= "PlayerAllocationFilter=true&PlayerTracking=true&RollingUpdateFix=true&PortRanges=true&PortPolicyNone=true&Example=true"
+ALPHA_FEATURE_GATES ?= "PlayerAllocationFilter=true&PlayerTracking=true&RollingUpdateFix=true&PortRanges=true&PortPolicyNone=true&AutopilotPassthroughPort=true&Example=true"
 
 # Build with Windows support
 WITH_WINDOWS=1
diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index c6c29ec766..6a7fc9e492 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -276,7 +276,7 @@ steps:
         declare -A versionsAndRegions=( [1.27]=us-east1 [1.28]=us-west1 [1.29]=europe-west1 )
 
         # Keep in sync with (the inverse of) pkg/util/runtime/features.go:featureDefaults
-        featureWithGate="PlayerAllocationFilter=true&PlayerTracking=true&CountsAndLists=false&RollingUpdateFix=true&PortRanges=true&PortPolicyNone=true&DisableResyncOnSDKServer=false&Example=true"
+        featureWithGate="PlayerAllocationFilter=true&PlayerTracking=true&CountsAndLists=false&RollingUpdateFix=true&PortRanges=true&PortPolicyNone=true&DisableResyncOnSDKServer=false&AutopilotPassthroughPort=true&Example=true"
         featureWithoutGate=""
 
         # Use this if specific feature gates can only be supported on specific Kubernetes versions.
diff --git a/install/helm/agones/defaultfeaturegates.yaml b/install/helm/agones/defaultfeaturegates.yaml
index 2bddc958c5..43dede41ba 100644
--- a/install/helm/agones/defaultfeaturegates.yaml
+++ b/install/helm/agones/defaultfeaturegates.yaml
@@ -19,6 +19,7 @@ CountsAndLists: true
 DisableResyncOnSDKServer: true
 
 # Alpha features
+AutopilotPassthroughPort: false
 GKEAutopilotExtendedDurationPods: false
 PlayerAllocationFilter: false
 PlayerTracking: false
@@ -27,7 +28,6 @@ PortRanges: false
 PortPolicyNone: false
 
 # Dev features
-FeatureAutopilotPassthroughPort: false
 
 # Example feature
 Example: false
diff --git a/pkg/util/runtime/features.go b/pkg/util/runtime/features.go
index 40c41468bb..02d0467d44 100644
--- a/pkg/util/runtime/features.go
+++ b/pkg/util/runtime/features.go
@@ -44,6 +44,9 @@ const (
 	////////////////
 	// Alpha features
 
+	// FeatureAutopilotPassthroughPort is a feature flag that enables/disables Passthrough Port Policy.
+	FeatureAutopilotPassthroughPort Feature = "AutopilotPassthroughPort"
+
 	// FeatureGKEAutopilotExtendedDurationPods enables the use of Extended Duration pods
 	// when Agones is running on Autopilot. Available on 1.28+ only.
 	FeatureGKEAutopilotExtendedDurationPods = "GKEAutopilotExtendedDurationPods"
@@ -67,9 +70,6 @@ const (
 	////////////////
 	// Dev features
 
-	// FeatureAutopilotPassthroughPort is a feature flag that enables/disables Passthrough Port Policy.
-	FeatureAutopilotPassthroughPort Feature = "PassthroughPortPolicy"
-
 	////////////////
 	// Example feature
 
@@ -132,6 +132,7 @@ var (
 		FeatureDisableResyncOnSDKServer: true,
 
 		// Alpha features
+		FeatureAutopilotPassthroughPort:         false,
 		FeatureGKEAutopilotExtendedDurationPods: false,
 		FeaturePlayerAllocationFilter:           false,
 		FeaturePlayerTracking:                   false,
@@ -140,7 +141,6 @@ var (
 		FeaturePortPolicyNone:                   false,
 
 		// Dev features
-		FeatureAutopilotPassthroughPort: false,
 
 		// Example feature
 		FeatureExample: false,
diff --git a/site/content/en/docs/Guides/feature-stages.md b/site/content/en/docs/Guides/feature-stages.md
index 947f1979eb..fe3139be2c 100644
--- a/site/content/en/docs/Guides/feature-stages.md
+++ b/site/content/en/docs/Guides/feature-stages.md
@@ -28,6 +28,7 @@ The current set of `alpha` and `beta` feature gates:
 | Feature Name                                                                                                                | Gate                               | Default  | Stage   | Since  |
 |-----------------------------------------------------------------------------------------------------------------------------|------------------------------------|----------|---------|--------|
 | [DisableResyncOnSDKServer](https://github.com/googleforgames/agones/issues/3377)                                            | `DisableResyncOnSDKServer`         | Enabled  | `Beta`  | 1.40.0 |
+| [Support Passthrough on GKE Autopilot](https://github.com/googleforgames/agones/issues/3721)                                | `AutopilotPassthroughPort`         | Disabled | `Alpha` | 1.40.0 |
 | [CountsAndLists](https://github.com/googleforgames/agones/issues/2716)                                                      | `CountsAndLists`                   | Disabled | `Alpha` | 1.37.0 |
 | [Support for Extended Duration Pods on GKE Autopilot (*1.28+ only*)](https://github.com/googleforgames/agones/issues/3386)  | `GKEAutopilotExtendedDurationPods` | Disabled | `Alpha` | 1.37.0 |
 | [GameServer player capacity filtering on GameServerAllocations](https://github.com/googleforgames/agones/issues/1239)       | `PlayerAllocationFilter`           | Disabled | `Alpha` | 1.14.0 |