feat: add Gateway discovery to detect unused Gateway API resources

README.md

@@ -34,6 +34,7 @@ Kor is a tool to discover unused Kubernetes resources. Currently, Kor can identi
 - NetworkPolicies
 - RoleBindings
 - VolumeAttachments
+- Gateways
 
 ![Kor Screenshot](/images/show_reason_screenshot.png)
 
@@ -135,6 +136,7 @@ Kor provides various subcommands to identify and list unused resources. The avai
 - `replicaset` - Gets unused replicaSets for the specified namespace or all namespaces.
 - `daemonset`- Gets unused DaemonSets for the specified namespace or all namespaces.
 - `volumeattachment` - Gets unused VolumeAttachments in the cluster (non-namespaced resource).
+- `gateway` - Gets unused Gateways for the specified namespace or all namespaces.
 - `finalizer` - Gets unused pending deletion resources for the specified namespace or all namespaces.
 - `networkpolicy` - Gets unused NetworkPolicies for the specified namespace or all namespaces.
 - `exporter` - Export Prometheus metrics.
@@ -269,6 +271,24 @@ Unused resources in namespace: "test"
 +---+----------------+----------------------------------------------+--------------------------------------------------------+
 ```
 
+#### Gateway Discovery
+
+Kor can discover unused Gateways by checking if they reference non-existing GatewayClasses or have no attached Routes:
+
+```sh
+kor gateway --show-reason
+```
+
+```
+Unused Gateways:
++---+------------+-----------------+--------------------------------------------+
+| # | NAMESPACE  | RESOURCE NAME   | REASON                                     |
++---+------------+-----------------+--------------------------------------------+
+| 1 | default    | web-gateway     | Gateway references a non-existing class   |
+| 2 | prod       | api-gateway     | Gateway has no attached routes             |
++---+------------+-----------------+--------------------------------------------+
+```
+
 #### Group by resource
 
 ```sh

charts/kor/templates/role.yaml

@@ -30,6 +30,18 @@ rules:
       - get
       - list
       - watch
+  - apiGroups: ["gateway.networking.k8s.io"]
+    resources:
+      - gateways
+      - httproutes
+      - grpcroutes
+      - tcproutes
+      - udproutes
+      - tlsroutes
+    verbs:
+      - get
+      - list
+      - watch
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: ClusterRole
@@ -70,3 +82,16 @@ rules:
       - get
       - list
       - watch
+  - apiGroups: ["gateway.networking.k8s.io"]
+    resources:
+      - gateways
+      - gatewayClasses
+      - httproutes
+      - grpcroutes
+      - tcproutes
+      - udproutes
+      - tlsroutes
+    verbs:
+      - get
+      - list
+      - watch

cmd/kor/all.go

@@ -17,9 +17,10 @@ var allCmd = &cobra.Command{
 		clientset := kor.GetKubeClient(kubeconfig)
 		apiExtClient := kor.GetAPIExtensionsClient(kubeconfig)
 		dynamicClient := kor.GetDynamicClient(kubeconfig)
+		gatewayClient := kor.GetGatewayClient(kubeconfig)
 		kor.SetNamespacedFlagState(cmd.Flags().Changed("namespaced"))
 
-		if response, err := kor.GetUnusedAll(filterOptions, clientset, apiExtClient, dynamicClient, outputFormat, opts); err != nil {
+		if response, err := kor.GetUnusedAll(filterOptions, clientset, apiExtClient, dynamicClient, gatewayClient, outputFormat, opts); err != nil {
 			fmt.Println(err)
 		} else {
 			utils.PrintLogo(outputFormat)

cmd/kor/exporter.go

@@ -16,8 +16,9 @@ var exporterCmd = &cobra.Command{
 		clientset := kor.GetKubeClient(kubeconfig)
 		apiExtClient := kor.GetAPIExtensionsClient(kubeconfig)
 		dynamicClient := kor.GetDynamicClient(kubeconfig)
+		gatewayClient := kor.GetGatewayClient(kubeconfig)
 		kor.SetNamespacedFlagState(cmd.Flags().Changed("namespaced"))
-		kor.Exporter(filterOptions, clientset, apiExtClient, dynamicClient, "json", opts, resourceList)
+		kor.Exporter(filterOptions, clientset, apiExtClient, dynamicClient, gatewayClient, "json", opts, resourceList)
 
 	},
 }

cmd/kor/gateways.go

@@ -0,0 +1,32 @@
+package kor
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/yonahd/kor/pkg/kor"
+	"github.com/yonahd/kor/pkg/utils"
+)
+
+var gatewayCmd = &cobra.Command{
+	Use:     "gateway",
+	Aliases: []string{"gw", "gateways"},
+	Short:   "Gets unused gateways",
+	Args:    cobra.ExactArgs(0),
+	Run: func(cmd *cobra.Command, args []string) {
+		clientset := kor.GetKubeClient(kubeconfig)
+		gatewayClient := kor.GetGatewayClient(kubeconfig)
+
+		if response, err := kor.GetUnusedGateways(filterOptions, clientset, gatewayClient, outputFormat, opts); err != nil {
+			fmt.Println(err)
+		} else {
+			utils.PrintLogo(outputFormat)
+			fmt.Println(response)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(gatewayCmd)
+}

cmd/kor/root.go

@@ -43,8 +43,9 @@ var rootCmd = &cobra.Command{
 		clientset := kor.GetKubeClient(kubeconfig)
 		apiExtClient := kor.GetAPIExtensionsClient(kubeconfig)
 		dynamicClient := kor.GetDynamicClient(kubeconfig)
+		gatewayClient := kor.GetGatewayClient(kubeconfig)
 
-		if response, err := kor.GetUnusedMulti(resourceNames, filterOptions, clientset, apiExtClient, dynamicClient, outputFormat, opts); err != nil {
+		if response, err := kor.GetUnusedMulti(resourceNames, filterOptions, clientset, apiExtClient, dynamicClient, gatewayClient, outputFormat, opts); err != nil {
 			fmt.Println(err)
 		} else {
 			utils.PrintLogo(outputFormat)

go.mod

@@ -13,6 +13,7 @@ require (
 	k8s.io/apimachinery v0.34.1
 	k8s.io/client-go v0.34.1
 	k8s.io/utils v0.0.0-20250604170112-4c0f3b243397
+	sigs.k8s.io/gateway-api v1.0.0
 	sigs.k8s.io/yaml v1.6.0
 )
 
@@ -25,7 +26,7 @@ require (
 	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
 	github.com/go-logr/logr v1.4.2 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
-	github.com/go-openapi/jsonreference v0.20.2 // indirect
+	github.com/go-openapi/jsonreference v0.21.0 // indirect
 	github.com/go-openapi/swag v0.23.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
@@ -70,5 +71,6 @@ require (
 	k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b // indirect
 	sigs.k8s.io/json v0.0.0-20241014173422-cfa47c3a1cc8 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.7.0 // indirect
 	sigs.k8s.io/structured-merge-diff/v6 v6.3.0 // indirect
 )

go.sum

@@ -3,7 +3,6 @@ github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6r
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
@@ -20,12 +19,10 @@ github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sa
 github.com/fxamacker/cbor/v2 v2.9.0/go.mod h1:vM4b+DJCtHn+zz7h3FFp/hDAI9WNWCsZj23V5ytsSxQ=
 github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
 github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
-github.com/go-openapi/jsonpointer v0.19.6/go.mod h1:osyAmYz/mB/C3I+WsTTSgw1ONzaLJoLCyoi6/zppojs=
 github.com/go-openapi/jsonpointer v0.21.0 h1:YgdVicSA9vH5RiHs9TZW5oyafXZFc6+2Vc1rr/O9oNQ=
 github.com/go-openapi/jsonpointer v0.21.0/go.mod h1:IUyH9l/+uyhIYQ/PXVA41Rexl+kOkAPDdXEYns6fzUY=
-github.com/go-openapi/jsonreference v0.20.2 h1:3sVjiK66+uXK/6oQ8xgcRKcFgQ5KXa2KvnJRumpMGbE=
-github.com/go-openapi/jsonreference v0.20.2/go.mod h1:Bl1zwGIM8/wsvqjsOQLJ/SH+En5Ap4rVB5KVcIDZG2k=
-github.com/go-openapi/swag v0.22.3/go.mod h1:UzaqsxGiab7freDnrUUra0MwWfN/q7tE4j+VcZ0yl14=
+github.com/go-openapi/jsonreference v0.21.0 h1:Rs+Y7hSXT83Jacb7kFyjn4ijOuVGSvOdF2+tg1TRrwQ=
+github.com/go-openapi/jsonreference v0.21.0/go.mod h1:LmZmgsrTkVg9LG4EaHeY8cBDslNPMo06cago5JNLkm4=
 github.com/go-openapi/swag v0.23.0 h1:vsEVJDUo2hPJ2tu0/Xc+4noaxyEffXNIs3cOULZ+GrE=
 github.com/go-openapi/swag v0.23.0/go.mod h1:esZ8ITTYEsH1V2trKHjAN8Ai7xHb8RV+YSZ577vPjgQ=
 github.com/go-task/slim-sprig/v3 v3.0.0 h1:sUs3vkvUymDpBKi3qH1YSqBQk9+9D/8M2mN1vB6EwHI=
@@ -36,6 +33,7 @@ github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
 github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/google/gnostic-models v0.7.0 h1:qwTtogB15McXDaNqTZdzPJRHvaVJlAl+HVQnLmJEJxo=
 github.com/google/gnostic-models v0.7.0/go.mod h1:whL5G0m6dmc5cPxKc5bdKdEN3UjI7OUGxBlw57miDrQ=
+github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
@@ -53,11 +51,8 @@ github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
 github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
-github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
@@ -92,6 +87,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=
@@ -122,14 +119,9 @@ github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3A
 github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
 github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjbTCAY=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
 github.com/stretchr/objx v0.5.2 h1:xuMeJ0Sdp5ZMRXx/aWO6RZxdr3beISkG5/G/aIRr3pY=
 github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=
@@ -194,7 +186,6 @@ gopkg.in/evanphx/json-patch.v4 v4.12.0 h1:n6jtcsulIzXPJaxegRbvFNNrZDjbij7ny3gmSP
 gopkg.in/evanphx/json-patch.v4 v4.12.0/go.mod h1:p8EYWUEYMpynmqDbY58zCKCFZw8pRWMG4EsWvDvM72M=
 gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 k8s.io/api v0.34.1 h1:jC+153630BMdlFukegoEL8E/yT7aLyQkIVuwhmwDgJM=
@@ -211,11 +202,21 @@ k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b h1:MloQ9/bdJyIu9lb1PzujOP
 k8s.io/kube-openapi v0.0.0-20250710124328-f3f2b991d03b/go.mod h1:UZ2yyWbFTpuhSbFhv24aGNOdoRdJZgsIObGBUaYVsts=
 k8s.io/utils v0.0.0-20250604170112-4c0f3b243397 h1:hwvWFiBzdWw1FhfY1FooPn3kzWuJ8tmbZBHi4zVsl1Y=
 k8s.io/utils v0.0.0-20250604170112-4c0f3b243397/go.mod h1:OLgZIPagt7ERELqWJFomSt595RzquPNLL48iOWgYOg0=
+sigs.k8s.io/gateway-api v1.0.0 h1:iPTStSv41+d9p0xFydll6d7f7MOBGuqXM6p2/zVYMAs=
+sigs.k8s.io/gateway-api v1.0.0/go.mod h1:4cUgr0Lnp5FZ0Cdq8FdRwCvpiWws7LVhLHGIudLlf4c=
+sigs.k8s.io/gateway-api v1.1.0 h1:DsLDXCi6jR+Xz8/xd0Z1PYl2Pn0TyaFMOPPZIj4inDM=
+sigs.k8s.io/gateway-api v1.1.0/go.mod h1:ZH4lHrL2sDi0FHZ9jjneb8kKnGzFWyrTya35sWUTrRs=
+sigs.k8s.io/gateway-api v1.3.0 h1:q6okN+/UKDATola4JY7zXzx40WO4VISk7i9DIfOvr9M=
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+sigs.k8s.io/randfill v0.0.0-20250304075658-069ef1bbf016/go.mod h1:XeLlZ/jmk4i1HRopwe7/aU3H5n1zNUcX6TM94b3QxOY=
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+sigs.k8s.io/structured-merge-diff/v4 v4.7.0 h1:qPeWmscJcXP0snki5IYF79Z8xrl8ETFxgMd7wez1XkI=
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+sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=
 sigs.k8s.io/yaml v1.6.0 h1:G8fkbMSAFqgEFgh4b1wmtzDnioxFCUgTZhlbj5P9QYs=
 sigs.k8s.io/yaml v1.6.0/go.mod h1:796bPqUfzR/0jLAl6XjHl3Ck7MiyVv8dbTdyT3/pMf4=

pkg/kor/all.go

@@ -9,6 +9,7 @@ import (
 	apiextensionsclientset "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
 	"k8s.io/client-go/dynamic"
 	"k8s.io/client-go/kubernetes"
+	gatewayclientset "sigs.k8s.io/gateway-api/pkg/client/clientset/versioned"
 
 	"github.com/yonahd/kor/pkg/common"
 	"github.com/yonahd/kor/pkg/filters"
@@ -302,7 +303,19 @@ func getUnusedRoleBindings(clientset kubernetes.Interface, namespace string, fil
 	return namespaceRoleBindingDiff
 }
 
-func GetUnusedAllNamespaced(filterOpts *filters.Options, clientset kubernetes.Interface, outputFormat string, opts common.Opts) (string, error) {
+func getUnusedGateways(clientset kubernetes.Interface, gatewayClient gatewayclientset.Interface, namespace string, filterOpts *filters.Options, opts common.Opts) ResourceDiff {
+	gatewayDiff, err := processNamespaceGateways(clientset, gatewayClient, namespace, filterOpts, opts)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failed to get %s namespace %s: %v\n", "gateways", namespace, err)
+	}
+	namespaceGatewayDiff := ResourceDiff{
+		"Gateway",
+		gatewayDiff,
+	}
+	return namespaceGatewayDiff
+}
+
+func GetUnusedAllNamespaced(filterOpts *filters.Options, clientset kubernetes.Interface, gatewayClient gatewayclientset.Interface, outputFormat string, opts common.Opts) (string, error) {
 	resources := make(map[string]map[string][]ResourceInfo)
 	for _, namespace := range filterOpts.Namespaces(clientset) {
 		switch opts.GroupBy {
@@ -325,6 +338,7 @@ func GetUnusedAllNamespaced(filterOpts *filters.Options, clientset kubernetes.In
 			resources[namespace]["DaemonSet"] = getUnusedDaemonSets(clientset, namespace, filterOpts, opts).diff
 			resources[namespace]["NetworkPolicy"] = getUnusedNetworkPolicies(clientset, namespace, filterOpts, opts).diff
 			resources[namespace]["RoleBinding"] = getUnusedRoleBindings(clientset, namespace, filterOpts, opts).diff
+			resources[namespace]["Gateway"] = getUnusedGateways(clientset, gatewayClient, namespace, filterOpts, opts).diff
 		case "resource":
 			appendResources(resources, "ConfigMap", namespace, getUnusedCMs(clientset, namespace, filterOpts, opts).diff)
 			appendResources(resources, "Service", namespace, getUnusedSVCs(clientset, namespace, filterOpts, opts).diff)
@@ -343,6 +357,7 @@ func GetUnusedAllNamespaced(filterOpts *filters.Options, clientset kubernetes.In
 			appendResources(resources, "DaemonSet", namespace, getUnusedDaemonSets(clientset, namespace, filterOpts, opts).diff)
 			appendResources(resources, "NetworkPolicy", namespace, getUnusedNetworkPolicies(clientset, namespace, filterOpts, opts).diff)
 			appendResources(resources, "RoleBinding", namespace, getUnusedRoleBindings(clientset, namespace, filterOpts, opts).diff)
+			appendResources(resources, "Gateway", namespace, getUnusedGateways(clientset, gatewayClient, namespace, filterOpts, opts).diff)
 		}
 	}
 
@@ -407,15 +422,15 @@ func GetUnusedAllNonNamespaced(filterOpts *filters.Options, clientset kubernetes
 	return unusedAllNonNamespaced, nil
 }
 
-func GetUnusedAll(filterOpts *filters.Options, clientset kubernetes.Interface, apiExtClient apiextensionsclientset.Interface, dynamicClient dynamic.Interface, outputFormat string, opts common.Opts) (string, error) {
+func GetUnusedAll(filterOpts *filters.Options, clientset kubernetes.Interface, apiExtClient apiextensionsclientset.Interface, dynamicClient dynamic.Interface, gatewayClient gatewayclientset.Interface, outputFormat string, opts common.Opts) (string, error) {
 	if NamespacedFlagUsed {
 		if opts.Namespaced {
-			return GetUnusedAllNamespaced(filterOpts, clientset, outputFormat, opts)
+			return GetUnusedAllNamespaced(filterOpts, clientset, gatewayClient, outputFormat, opts)
 		}
 		return GetUnusedAllNonNamespaced(filterOpts, clientset, apiExtClient, dynamicClient, outputFormat, opts)
 	}
 
-	unusedAllNamespaced, err := GetUnusedAllNamespaced(filterOpts, clientset, outputFormat, opts)
+	unusedAllNamespaced, err := GetUnusedAllNamespaced(filterOpts, clientset, gatewayClient, outputFormat, opts)
 	if err != nil {
 		fmt.Printf("err: %v\n", err)
 	}