diff --git a/internal/controller/indexer/indexer.go b/internal/controller/indexer/indexer.go
index 0acdf693b..1ba3a4d8c 100644
--- a/internal/controller/indexer/indexer.go
+++ b/internal/controller/indexer/indexer.go
@@ -890,6 +890,7 @@ func IngressClassParametersRefIndexFunc(rawObj client.Object) []string {
 		ingressClass.Spec.Parameters.Kind == internaltypes.KindGatewayProxy {
 		namespace := k8sutils.GetIngressClassParametersNamespace(*ingressClass)
 		return []string{GenIndexKey(namespace, ingressClass.Spec.Parameters.Name)}
+<<<<<<< HEAD
 	}
 	return nil
 }
@@ -903,6 +904,8 @@ func IngressClassV1beta1ParametersRefIndexFunc(rawObj client.Object) []string {
 		ingressClass.Spec.Parameters.Kind == internaltypes.KindGatewayProxy {
 		namespace := k8sutils.GetIngressClassV1beta1ParametersNamespace(*ingressClass)
 		return []string{GenIndexKey(namespace, ingressClass.Spec.Parameters.Name)}
+=======
+>>>>>>> b52c26c8 (feat: support custom gatewayproxy namespace for ingressclass (#2701))
 	}
 	return nil
 }
diff --git a/internal/controller/ingressclass_controller.go b/internal/controller/ingressclass_controller.go
index b0cea10e9..f92ed7226 100644
--- a/internal/controller/ingressclass_controller.go
+++ b/internal/controller/ingressclass_controller.go
@@ -173,3 +173,71 @@ func (r *IngressClassReconciler) listIngressClassesForSecret(ctx context.Context
 
 	return distinctRequests(requests)
 }
+<<<<<<< HEAD
+=======
+
+func (r *IngressClassReconciler) processInfrastructure(tctx *provider.TranslateContext, ingressClass *networkingv1.IngressClass) error {
+	if ingressClass.Spec.Parameters == nil {
+		return nil
+	}
+
+	if ingressClass.Spec.Parameters.APIGroup == nil ||
+		*ingressClass.Spec.Parameters.APIGroup != v1alpha1.GroupVersion.Group ||
+		ingressClass.Spec.Parameters.Kind != KindGatewayProxy {
+		return nil
+	}
+
+	namespace := utils.GetIngressClassParametersNamespace(*ingressClass)
+
+	gatewayProxy := new(v1alpha1.GatewayProxy)
+	if err := r.Get(context.Background(), client.ObjectKey{
+		Namespace: namespace,
+		Name:      ingressClass.Spec.Parameters.Name,
+	}, gatewayProxy); err != nil {
+		return fmt.Errorf("failed to get gateway proxy: %w", err)
+	}
+
+	rk := utils.NamespacedNameKind(ingressClass)
+
+	tctx.GatewayProxies[rk] = *gatewayProxy
+	tctx.ResourceParentRefs[rk] = append(tctx.ResourceParentRefs[rk], rk)
+
+	// Load secrets if needed
+	if gatewayProxy.Spec.Provider != nil && gatewayProxy.Spec.Provider.ControlPlane != nil {
+		auth := gatewayProxy.Spec.Provider.ControlPlane.Auth
+		if auth.Type == v1alpha1.AuthTypeAdminKey && auth.AdminKey != nil && auth.AdminKey.ValueFrom != nil {
+			if auth.AdminKey.ValueFrom.SecretKeyRef != nil {
+				secretRef := auth.AdminKey.ValueFrom.SecretKeyRef
+				secret := &corev1.Secret{}
+				if err := r.Get(context.Background(), client.ObjectKey{
+					Namespace: namespace,
+					Name:      secretRef.Name,
+				}, secret); err != nil {
+					r.Log.Error(err, "failed to get secret for gateway proxy", "namespace", namespace, "name", secretRef.Name)
+					return err
+				}
+				tctx.Secrets[client.ObjectKey{
+					Namespace: namespace,
+					Name:      secretRef.Name,
+				}] = secret
+			}
+		}
+	}
+
+	if service := gatewayProxy.Spec.Provider.ControlPlane.Service; service != nil {
+		if err := addProviderEndpointsToTranslateContext(tctx, r.Client, r.Log, types.NamespacedName{
+			Namespace: gatewayProxy.GetNamespace(),
+			Name:      service.Name,
+		}); err != nil {
+			return err
+		}
+	}
+
+	_, ok := tctx.GatewayProxies[rk]
+	if !ok {
+		return fmt.Errorf("no gateway proxy found for ingress class")
+	}
+
+	return nil
+}
+>>>>>>> b52c26c8 (feat: support custom gatewayproxy namespace for ingressclass (#2701))
diff --git a/internal/controller/utils.go b/internal/controller/utils.go
index f34f01a45..e2db71dc7 100644
--- a/internal/controller/utils.go
+++ b/internal/controller/utils.go
@@ -1733,7 +1733,10 @@ func GetGatewayProxyByIngressClass(ctx context.Context, r client.Client, ingress
 		return nil, nil
 	}
 
+<<<<<<< HEAD
 	// Use utility function to get namespace, which handles annotation fallback
+=======
+>>>>>>> b52c26c8 (feat: support custom gatewayproxy namespace for ingressclass (#2701))
 	namespace := utils.GetIngressClassParametersNamespace(*ingressClass)
 
 	gatewayProxy := new(v1alpha1.GatewayProxy)
diff --git a/internal/utils/k8s.go b/internal/utils/k8s.go
index 55ea03eff..f04cbd346 100644
--- a/internal/utils/k8s.go
+++ b/internal/utils/k8s.go
@@ -22,7 +22,10 @@ import (
 	"regexp"
 
 	networkingv1 "k8s.io/api/networking/v1"
+<<<<<<< HEAD
 	networkingv1beta1 "k8s.io/api/networking/v1beta1"
+=======
+>>>>>>> b52c26c8 (feat: support custom gatewayproxy namespace for ingressclass (#2701))
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	k8stypes "k8s.io/apimachinery/pkg/types"
 	"sigs.k8s.io/controller-runtime/pkg/client"
@@ -112,6 +115,7 @@ func GetIngressClassParametersNamespace(ingressClass networkingv1.IngressClass)
 	}
 	return namespace
 }
+<<<<<<< HEAD
 
 func GetIngressClassV1beta1ParametersNamespace(ingressClass networkingv1beta1.IngressClass) string {
 	namespace := "default"
@@ -123,3 +127,5 @@ func GetIngressClassV1beta1ParametersNamespace(ingressClass networkingv1beta1.In
 	}
 	return namespace
 }
+=======
+>>>>>>> b52c26c8 (feat: support custom gatewayproxy namespace for ingressclass (#2701))
diff --git a/internal/webhook/v1/ingressclass_webhook.go b/internal/webhook/v1/ingressclass_webhook.go
index 4d77fe8a5..67d2c3604 100644
--- a/internal/webhook/v1/ingressclass_webhook.go
+++ b/internal/webhook/v1/ingressclass_webhook.go
@@ -31,6 +31,7 @@ import (
 	v1alpha1 "github.com/apache/apisix-ingress-controller/api/v1alpha1"
 	"github.com/apache/apisix-ingress-controller/internal/controller/config"
 	internaltypes "github.com/apache/apisix-ingress-controller/internal/types"
+	"github.com/apache/apisix-ingress-controller/internal/utils"
 )
 
 // nolint:unused
@@ -106,10 +107,7 @@ func (v *IngressClassCustomValidator) warnIfMissingGatewayProxyForIngressClass(c
 		return nil
 	}
 
-	ns := ingressClass.GetNamespace()
-	if params.Namespace != nil && *params.Namespace != "" {
-		ns = *params.Namespace
-	}
+	ns := utils.GetIngressClassParametersNamespace(*ingressClass)
 	name := params.Name
 
 	var gp v1alpha1.GatewayProxy
diff --git a/test/e2e/crds/v2/basic.go b/test/e2e/crds/v2/basic.go
index 7b197e107..5cca40b38 100644
--- a/test/e2e/crds/v2/basic.go
+++ b/test/e2e/crds/v2/basic.go
@@ -121,4 +121,81 @@ spec:
 			Eventually(request).WithArguments("/headers").WithTimeout(8 * time.Second).ProbeEvery(time.Second).Should(Equal(http.StatusNotFound))
 		})
 	})
+
+	Context("IngressClass Annotations", func() {
+		It("Basic tests", func() {
+			const ingressClassYaml = `
+apiVersion: networking.k8s.io/v1
+kind: IngressClass
+metadata:
+  name: %s
+  annotations:
+    apisix.apache.org/parameters-namespace: %s
+spec:
+  controller: %s
+  parameters:
+    apiGroup: apisix.apache.org
+    kind: GatewayProxy
+    name: apisix-proxy-config
+`
+
+			By("create GatewayProxy")
+
+			err := s.CreateResourceFromString(s.GetGatewayProxySpec())
+			Expect(err).NotTo(HaveOccurred(), "creating GatewayProxy")
+			time.Sleep(5 * time.Second)
+
+			By("create IngressClass")
+			ingressClass := fmt.Sprintf(ingressClassYaml, s.Namespace(), s.Namespace(), s.GetControllerName())
+			err = s.CreateResourceFromString(ingressClass)
+			Expect(err).NotTo(HaveOccurred(), "creating IngressClass")
+			time.Sleep(5 * time.Second)
+
+			const apisixRouteSpec = `
+apiVersion: apisix.apache.org/v2
+kind: ApisixRoute
+metadata:
+  name: default
+spec:
+  ingressClassName: %s
+  http:
+  - name: rule0
+    match:
+      hosts:
+      - httpbin
+      paths:
+      - %s
+    backends:
+    - serviceName: httpbin-service-e2e-test
+      servicePort: 80
+`
+			request := func(path string) int {
+				return s.NewAPISIXClient().GET(path).WithHost("httpbin").Expect().Raw().StatusCode
+			}
+
+			By("apply ApisixRoute")
+			var apisixRoute apiv2.ApisixRoute
+			applier.MustApplyAPIv2(types.NamespacedName{Namespace: s.Namespace(), Name: "default"}, &apisixRoute,
+				fmt.Sprintf(apisixRouteSpec, s.Namespace(), "/get"))
+
+			By("verify ApisixRoute works")
+			Eventually(request).WithArguments("/get").WithTimeout(8 * time.Second).ProbeEvery(time.Second).Should(Equal(http.StatusOK))
+
+			By("update ApisixRoute")
+			applier.MustApplyAPIv2(types.NamespacedName{Namespace: s.Namespace(), Name: "default"}, &apisixRoute,
+				fmt.Sprintf(apisixRouteSpec, s.Namespace(), "/headers"))
+			Eventually(request).WithArguments("/get").WithTimeout(8 * time.Second).ProbeEvery(time.Second).Should(Equal(http.StatusNotFound))
+			s.RequestAssert(&scaffold.RequestAssert{
+				Method: "GET",
+				Path:   "/headers",
+				Host:   "httpbin",
+				Check:  scaffold.WithExpectedStatus(http.StatusOK),
+			})
+
+			By("delete ApisixRoute")
+			err = s.DeleteResource("ApisixRoute", "default")
+			Expect(err).ShouldNot(HaveOccurred(), "deleting ApisixRoute")
+			Eventually(request).WithArguments("/headers").WithTimeout(8 * time.Second).ProbeEvery(time.Second).Should(Equal(http.StatusNotFound))
+		})
+	})
 })