diff --git a/build/Makefile b/build/Makefile
index ef5e125c3a..4cd5cca3c7 100644
--- a/build/Makefile
+++ b/build/Makefile
@@ -69,7 +69,7 @@ KIND_CONTAINER_NAME=$(KIND_PROFILE)-control-plane
 GS_TEST_IMAGE ?= us-docker.pkg.dev/agones-images/examples/simple-game-server:0.43
 
 # Enable all beta feature gates. Keep in sync with `true` (beta) entries in pkg/util/runtime/features.go:featureDefaults
-BETA_FEATURE_GATES ?= "CountsAndLists=true&GKEAutopilotExtendedDurationPods=true&PortPolicyNone=true&PortRanges=true&RollingUpdateFix=true&ScheduledAutoscaler=true&SidecarContainers=true&FleetAutoscaleRequestMetaData=true"
+BETA_FEATURE_GATES ?= "CountsAndLists=true&GKEAutopilotExtendedDurationPods=true&PortRanges=true&RollingUpdateFix=true&ScheduledAutoscaler=true&SidecarContainers=true&FleetAutoscaleRequestMetaData=true"
 
 
 # Enable all alpha feature gates. Keep in sync with `false` (alpha) entries in pkg/util/runtime/features.go:featureDefaults
diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index bb7c01740a..134c367b39 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -322,7 +322,7 @@ steps:
 
         # Keep in sync with the inverse of 'alpha' and 'beta' features in
         # pkg/util/runtime/features.go:featureDefaults
-        featureWithGate="PlayerAllocationFilter=true&FleetAutoscaleRequestMetaData=false&PlayerTracking=true&CountsAndLists=false&RollingUpdateFix=false&PortRanges=false&PortPolicyNone=false&ScheduledAutoscaler=false&GKEAutopilotExtendedDurationPods=false&SidecarContainers=false&WasmAutoscaler=true&Example=true"
+        featureWithGate="PlayerAllocationFilter=true&FleetAutoscaleRequestMetaData=false&PlayerTracking=true&CountsAndLists=false&RollingUpdateFix=false&PortRanges=false&ScheduledAutoscaler=false&GKEAutopilotExtendedDurationPods=false&SidecarContainers=false&WasmAutoscaler=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 9aab1d8e35..5f9fd77d4a 100644
--- a/install/helm/agones/defaultfeaturegates.yaml
+++ b/install/helm/agones/defaultfeaturegates.yaml
@@ -19,12 +19,12 @@
 # previous version with the feature flag do not fail on parsing an unknown flag.
 DisableResyncOnSDKServer: true
 AutopilotPassthroughPort: true
+PortPolicyNone: true
 
 # Beta features
 
 CountsAndLists: true
 GKEAutopilotExtendedDurationPods: true
-PortPolicyNone: true
 PortRanges: true
 ScheduledAutoscaler: true
 RollingUpdateFix: true
diff --git a/pkg/apis/agones/v1/gameserver.go b/pkg/apis/agones/v1/gameserver.go
index fc94ec99d2..f48a5a9b8c 100644
--- a/pkg/apis/agones/v1/gameserver.go
+++ b/pkg/apis/agones/v1/gameserver.go
@@ -535,13 +535,7 @@ func (gss *GameServerSpec) validateFeatureGates(fldPath *field.Path) field.Error
 		}
 	}
 
-	if !runtime.FeatureEnabled(runtime.FeaturePortPolicyNone) {
-		for i, p := range gss.Ports {
-			if p.PortPolicy == None {
-				allErrs = append(allErrs, field.Forbidden(fldPath.Child("ports").Index(i).Child("portPolicy"), fmt.Sprintf("Value cannot be set to %s unless feature flag %s is enabled", None, runtime.FeaturePortPolicyNone)))
-			}
-		}
-	}
+
 
 	return allErrs
 }
@@ -791,7 +785,7 @@ func (gs *GameServer) Pod(apiHooks APIHooks, sidecars ...corev1.Container) (*cor
 		var hostPort int32
 		portIdx := 0
 
-		if !runtime.FeatureEnabled(runtime.FeaturePortPolicyNone) || p.PortPolicy != None {
+		if p.PortPolicy != None {
 			hostPort = p.HostPort
 		}
 
@@ -944,7 +938,7 @@ func (gs *GameServer) HasPortPolicy(policy PortPolicy) bool {
 
 // Status returns a GameServerStatusPort for this GameServerPort
 func (p GameServerPort) Status() GameServerStatusPort {
-	if runtime.FeatureEnabled(runtime.FeaturePortPolicyNone) && p.PortPolicy == None {
+	if p.PortPolicy == None {
 		return GameServerStatusPort{Name: p.Name, Port: p.ContainerPort}
 	}
 
diff --git a/pkg/cloudproduct/gke/gke.go b/pkg/cloudproduct/gke/gke.go
index 4b7963d54f..b537fbaf81 100644
--- a/pkg/cloudproduct/gke/gke.go
+++ b/pkg/cloudproduct/gke/gke.go
@@ -307,16 +307,13 @@ func validatePortPolicy(p agonesv1.GameServerPort, i int, fldPath *field.Path) f
 	case agonesv1.Dynamic, agonesv1.Passthrough:
 		// These policies are always valid on GKE Autopilot.
 	case agonesv1.None:
-		// "None" is valid only if the feature gate FeaturePortPolicyNone is enabled.
-		if !runtime.FeatureEnabled(runtime.FeaturePortPolicyNone) {
-			allErrs = append(allErrs, field.Invalid(portPath.Child("portPolicy"), p.PortPolicy, "PortPolicy 'None' is not enabled"))
-		}
+		// PortPolicyNone is stable; None is always a valid policy on GKE Autopilot.
 	default:
 		// Any other port policy, such as "Static", is considered invalid on GKE Autopilot.
 		allErrs = append(allErrs, field.Invalid(portPath.Child("portPolicy"), p.PortPolicy, "portPolicy must be Dynamic, Passthrough, or None on GKE Autopilot"))
 	}
 
-	if p.Range != agonesv1.DefaultPortRange && (p.PortPolicy != agonesv1.None || !runtime.FeatureEnabled(runtime.FeaturePortPolicyNone)) {
+	if p.Range != agonesv1.DefaultPortRange && p.PortPolicy != agonesv1.None {
 		allErrs = append(allErrs, field.Invalid(fldPath.Child("ports").Index(i).Child("range"), p.Range, errRangeInvalid))
 	}
 
diff --git a/pkg/util/runtime/features.go b/pkg/util/runtime/features.go
index 32fcc8c73b..752e2b9835 100644
--- a/pkg/util/runtime/features.go
+++ b/pkg/util/runtime/features.go
@@ -151,12 +151,12 @@ var (
 		// Note that stable features cannot be set to "false", and are here so that upgrades from a
 		// previous version with the feature flag do not fail on parsing an unknown flag.
 		FeatureDisableResyncOnSDKServer: true,
+		FeaturePortPolicyNone:           true,
 		FeatureAutopilotPassthroughPort: true,
 
 		// Beta features
 		FeatureCountsAndLists:                   true,
 		FeatureGKEAutopilotExtendedDurationPods: true,
-		FeaturePortPolicyNone:                   true,
 		FeaturePortRanges:                       true,
 		FeatureRollingUpdateFix:                 true,
 		FeatureScheduledAutoscaler:              true,
diff --git a/site/content/en/docs/Guides/feature-stages.md b/site/content/en/docs/Guides/feature-stages.md
index 12e5efee07..4338fc886d 100644
--- a/site/content/en/docs/Guides/feature-stages.md
+++ b/site/content/en/docs/Guides/feature-stages.md
@@ -41,7 +41,6 @@ The current set of `alpha`, `beta` and `stable` feature gates include:
 |------------------------------------------------------------------------------------------------------------------------|------------------------------------|---------|--------|--------|
 | [CountsAndLists](https://github.com/agones-dev/agones/issues/2716)                                                     | `CountsAndLists`                   | Enabled | `Beta` | 1.41.0 |
 | [Support for Extended Duration Pods on GKE Autopilot (*1.28+ only*)](https://github.com/agones-dev/agones/issues/3386) | `GKEAutopilotExtendedDurationPods` | Enabled | `Beta` | 1.44.0 |
-| [Port Policy None](https://github.com/agones-dev/agones/issues/3804)                                                   | `PortPolicyNone`                   | Enabled | `Beta` | 1.49.0 |
 | [Multiple dynamic port ranges](https://github.com/agones-dev/agones/issues/1911)                                       | `PortRanges`                       | Enabled | `Beta` | 1.49.0 |
 | [Rolling Update Fixes](https://github.com/agones-dev/agones/issues/3688)                                               | `RollingUpdateFix`                 | Enabled | `Beta` | 1.50.0 |
 | [Scheduled Fleet Autoscaling](https://github.com/agones-dev/agones/issues/3008)                                        | `ScheduledAutoscaler`              | Enabled | `Beta` | 1.51.0 |
@@ -54,6 +53,7 @@ The current set of `alpha`, `beta` and `stable` feature gates include:
 |------------------------------------------------------------------------------------------|----------------------------|---------|----------|--------|
 | [DisableResyncOnSDKServer](https://github.com/agones-dev/agones/issues/3377)             | `DisableResyncOnSDKServer` | Enabled | `Stable` | 1.49.0 |
 | [Support Passthrough on GKE Autopilot](https://github.com/agones-dev/agones/issues/3721) | `AutopilotPassthroughPort` | Enabled | `Stable` | 1.54.0 |
+| [Port Policy None](https://github.com/agones-dev/agones/issues/3804)                                                   | `PortPolicyNone`                   | Enabled | `Stable` | 1.49.0 |
 
 [fleet-updates]: {{% relref "./fleet-updates.md#notifying-gameservers-on-fleet-updatedownscale" %}}
 
diff --git a/test/upgrade/versionMap.yaml b/test/upgrade/versionMap.yaml
index 763663bd26..362444844d 100644
--- a/test/upgrade/versionMap.yaml
+++ b/test/upgrade/versionMap.yaml
@@ -129,7 +129,8 @@ data:
         },
         "Dev": {
           "alphaGates": ["PlayerAllocationFilter", "PlayerTracking", "WasmAutoscaler"],
-          "betaGates": ["CountsAndLists", "GKEAutopilotExtendedDurationPods", "PortPolicyNone", "PortRanges", "RollingUpdateFix", "ScheduledAutoscaler",  "FleetAutoscaleRequestMetaData", "SidecarContainers"]
+          "betaGates": ["CountsAndLists", "GKEAutopilotExtendedDurationPods", "PortRanges", "RollingUpdateFix", "ScheduledAutoscaler", "FleetAutoscaleRequestMetaData", "SidecarContainers"],
+          "stableGates": ["PortPolicyNone"]
         }
       }
     }