diff --git a/internal/service/kubernetes_service.go b/internal/service/kubernetes_service.go
index 9f898084..34989c91 100644
--- a/internal/service/kubernetes_service.go
+++ b/internal/service/kubernetes_service.go
@@ -58,6 +58,11 @@ var watchedGVRs = []schema.GroupVersionResource{
 		Version:  "v1",
 		Resource: "httproutes",
 	},
+	{
+		Group:    "gateway.networking.k8s.io",
+		Version:  "v1",
+		Resource: "grpcroutes",
+	},
 }
 
 func NewKubernetesService(
diff --git a/internal/service/kubernetes_service_test.go b/internal/service/kubernetes_service_test.go
index c58d28be..8bcb5836 100644
--- a/internal/service/kubernetes_service_test.go
+++ b/internal/service/kubernetes_service_test.go
@@ -194,6 +194,25 @@ func TestKubernetesService(t *testing.T) {
 				assert.Nil(t, got)
 			},
 		},
+		{
+			description: "UpdateFromItem parses annotations and populates cache from grpcroute",
+			run: func(t *testing.T, svc *KubernetesService) {
+				item := unstructured.Unstructured{}
+				item.SetNamespace("default")
+				item.SetName("test-grpcroute")
+				item.SetAnnotations(map[string]string{
+					"tinyauth.apps.grpcapp.config.domain": "grpcapp.example.com",
+					"tinyauth.apps.grpcapp.users.allow":   "carol",
+				})
+
+				svc.updateFromItem(&item)
+
+				got := svc.getByDomain("grpcapp.example.com")
+				require.NotNil(t, got)
+				assert.Equal(t, "grpcapp.example.com", got.Config.Domain)
+				assert.Equal(t, "carol", got.Users.Allow)
+			},
+		},
 		{
 			description: "Ingress and HTTPRoute apps coexist in cache",
 			run: func(t *testing.T, svc *KubernetesService) {