diff --git a/README.md b/README.md
index 46f1165..013ca43 100644
--- a/README.md
+++ b/README.md
@@ -303,9 +303,9 @@ $ biko gcp [product] [flag(s)]
 | App Engine | Go to GAE Dashboard | `appengine`, `gae` | - |
 | Compute Engine | Go to GCE page | `compute` | -  |
 | Cloud Functions | Go to Cloud Functions page or the functions detail | `functions`, `f` |  `--region, -r`, `--name, -n` |
-| Cloud Run | Go to Cloud Run page or the deployments detail | `run` | `--region, -r`, `--name, -n` |	
+| Cloud Run | Go to Cloud Run page or the deployments detail | `run` | `--region, -r`, `--name, -n` |
 | KMS | Go to security's cryptographic keys page | `kms` | - |
-| Kubernetes | Go to GKE page, or the cluster detail | `kubernetes`, `gke` | `--region, -r`, `--name, -n` | 
+| Kubernetes | Go to GKE page, or the cluster detail | `kubernetes`, `gke` | `--region, -r`, `--name, -n` `--namespaces, -ns` |
 
 **Storage**
 
diff --git a/cli/gcp.go b/cli/gcp.go
index cd8c9cf..0fed348 100644
--- a/cli/gcp.go
+++ b/cli/gcp.go
@@ -136,6 +136,10 @@ func newGCPGKECmd() cli.Command {
 				Name:  "name, n",
 				Usage: "Name of the cluter",
 			},
+			cli.StringFlag{
+				Name: "namespaces, ns",
+				Usage: "Namespaces of workload page to open (you can input multiple namespaces by comma-speparated string)",
+			},
 		},
 		Action: func(c *cli.Context) error {
 			gcp, err := gcp.GetProvider()
diff --git a/go.mod b/go.mod
index 5686489..e1c14c6 100644
--- a/go.mod
+++ b/go.mod
@@ -3,10 +3,8 @@ module github.com/KeisukeYamashita/biko
 require (
 	github.com/BurntSushi/toml v0.3.1
 	github.com/go-ini/ini v1.62.0
-	github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 // indirect
-	github.com/k0kubun/pp v3.0.1+incompatible
-	github.com/mattn/go-colorable v0.1.4 // indirect
 	github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337 // indirect
+	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli v1.22.5
 	gopkg.in/ini.v1 v1.48.0 // indirect
 )
diff --git a/go.sum b/go.sum
index 0aa1e10..3996aad 100644
--- a/go.sum
+++ b/go.sum
@@ -2,40 +2,15 @@ github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
-github.com/go-ini/ini v1.48.0 h1:TvO60hO/2xgaaTWp2P0wUe4CFxwdMzfbkv3+343Xzqw=
-github.com/go-ini/ini v1.48.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.49.0 h1:ymWFBUkwN3JFPjvjcJJ5TSTwh84M66QrH+8vOytLgRY=
-github.com/go-ini/ini v1.49.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.50.0 h1:ogX6RS8VstVN8MJcwhEP78hHhWaI3klN02+97bByabY=
-github.com/go-ini/ini v1.50.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.51.0 h1:VPJKXGzbKlyExUE8f41aV57yxkYx5R49yR6n7flp0M0=
-github.com/go-ini/ini v1.51.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.51.1 h1:/QG3cj23k5V8mOl4JnNzUNhc1kr/jzMiNsNuWKcx8gM=
-github.com/go-ini/ini v1.51.1/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.52.0 h1:3UeUAveYUTCYV/G0jNDiIrrtIeAl1oAjshYyU2PaAlQ=
-github.com/go-ini/ini v1.52.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.54.0 h1:BHD3JkWSl+IbBEq2jHTdv16W/1ex7z9GFCHh0+ytm2M=
-github.com/go-ini/ini v1.54.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.56.0 h1:6HjxSjqdmgnujDPhlzR4a44lxK3w03WPN8te0SoUSeM=
-github.com/go-ini/ini v1.56.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.57.0 h1:Qwzj3wZQW+Plax5Ntj+GYe07DfGj1OH+aL1nMTMaNow=
-github.com/go-ini/ini v1.57.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.60.2 h1:5Knh3NM49qPogjoA8WUnaa/S0eiJ5FbrJpRqJB3b5XE=
-github.com/go-ini/ini v1.60.2/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
-github.com/go-ini/ini v1.61.0 h1:+IytwU4FcXqB+i5Vqiu/Ybf/Jdin9Pwzdxs5lmuT10o=
-github.com/go-ini/ini v1.61.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-ini/ini v1.62.0 h1:7VJT/ZXjzqSrvtraFp4ONq80hTcRQth1c9ZnQ3uNQvU=
 github.com/go-ini/ini v1.62.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
-github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 h1:uC1QfSlInpQF+M0ao65imhwqKnz3Q2z/d8PWZRMQvDM=
-github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88/go.mod h1:3w7q1U84EfirKl04SVQ/s7nPm1ZPhiXd34z40TNz36k=
-github.com/k0kubun/pp v3.0.1+incompatible h1:3tqvf7QgUnZ5tXO6pNAZlrvHgl6DvifjDrd9g2S9Z40=
-github.com/k0kubun/pp v3.0.1+incompatible/go.mod h1:GWse8YhT0p8pT4ir3ZgBbfZild3tgzSScAn6HmfYukg=
-github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
-github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
-github.com/mattn/go-isatty v0.0.8 h1:HLtExJ+uU2HOZ+wI0Tt5DtUDrx8yhUqDcp7fYERX4CE=
-github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
+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/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
@@ -45,20 +20,20 @@ github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykE
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
 github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337 h1:WN9BUFbdyOsSH/XohnWpXOlq9NBD5sGAB2FciQMUEe8=
 github.com/smartystreets/goconvey v0.0.0-20190731233626-505e41936337/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
-github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
-github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
-github.com/urfave/cli v1.22.2 h1:gsqYFH8bb9ekPA12kRo0hfjngWQjkJPlN9R0N78BoUo=
-github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
-github.com/urfave/cli v1.22.4 h1:u7tSpNPPswAFymm8IehJhy4uJMlUuU/GmqSkvJ1InXA=
-github.com/urfave/cli v1.22.4/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/urfave/cli v1.22.5 h1:lNq9sAHXK2qfdI8W+GRItjCEkI+2oR4d+MEHy1CKXoU=
 github.com/urfave/cli v1.22.5/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/ini.v1 v1.48.0 h1:URjZc+8ugRY5mL5uUeQH/a63JcHwdX9xZaWvmNWD7z8=
 gopkg.in/ini.v1 v1.48.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/providers/gcp/gcp.go b/providers/gcp/gcp.go
index db4f7cf..754bfbd 100644
--- a/providers/gcp/gcp.go
+++ b/providers/gcp/gcp.go
@@ -19,6 +19,8 @@ import (
 	"net/url"
 	"os"
 	"path"
+	"strconv"
+	"strings"
 
 	"github.com/KeisukeYamashita/biko/alias"
 	"github.com/go-ini/ini"
@@ -137,21 +139,24 @@ func (p *Provider) addProductPath(product string) {
 		p.join(product)
 		var db, table string
 		if db = p.GetCtxString("database"); db != "" {
-			param := url.Values{}
-			param.Add("d", db)
+			q := p.URL.Query()
+			q.Add("d", db)
 			if table = p.GetCtxString("table"); table != "" {
-				param.Add("t", table)
+				q.Add("t", table)
 			}
-			p.URL.RawQuery = param.Encode()
+			p.URL.RawQuery = q.Encode()
 		}
 	case "kubernetes":
 		p.join(product)
-		var region, name string
+		var region, name, namespaces string
 		if region = p.GetCtxString("region"); region != "" {
 			p.join(fmt.Sprintf("details/%s", region))
 			if name = p.GetCtxString("name"); name != "" {
 				p.join(name)
 			}
+		} else if namespaces = p.GetCtxString("namespaces"); namespaces != "" {
+			p.join("workload")
+			p.addGKEPageStateParam(namespaces)
 		}
 	case "spanner":
 		p.join(product)
@@ -213,12 +218,28 @@ func (p *Provider) addProductPath(product string) {
 }
 
 func (p *Provider) addProjectParam() {
-	params := url.Values{}
-	params.Add("project", p.SDKConfig.Core.Project)
-	p.URL.RawQuery = params.Encode()
+	q := p.URL.Query()
+	q.Add("project", p.SDKConfig.Core.Project)
+	p.URL.RawQuery = q.Encode()
+	return
+}
+
+func (p *Provider) addGKEPageStateParam(namespaces string) {
+	q := p.URL.Query()
+	q.Add("pageState", constructPageStateParam(namespaces))
+	p.URL.RawQuery = q.Encode()
 	return
 }
 
+func constructPageStateParam(rawNamespaces string) string {
+	nss := strings.Split(rawNamespaces, ",")
+	quotedNamespaces := make([]string, 0, len(nss))
+	for _, s := range nss {
+		quotedNamespaces = append(quotedNamespaces, strconv.Quote(s))
+	}
+	return fmt.Sprintf("(\"savedViews\":(\"n\":[%s]))", strings.Join(quotedNamespaces, ","))
+}
+
 // GetCtxString ...
 func (p *Provider) GetCtxString(str string) string {
 	key := p.Ctx.String(str)
diff --git a/providers/gcp/gcp_test.go b/providers/gcp/gcp_test.go
index a40bf04..8003bde 100644
--- a/providers/gcp/gcp_test.go
+++ b/providers/gcp/gcp_test.go
@@ -17,6 +17,8 @@ package gcp
 import (
 	"reflect"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 const (
@@ -48,3 +50,29 @@ func TestGetSDKConfig(t *testing.T) {
 		t.Fatalf("getSDKConfig failed not deep equal got:%v, want:%v", conf, want)
 	}
 }
+
+func TestConstructPageStateParam(t *testing.T) {
+	tests := map[string]struct {
+		namespace string
+		want      string
+	}{
+		"single namespace": {
+			namespace: "abc",
+			want:      "(\"savedViews\":(\"n\":[\"abc\"]))",
+		},
+		"two namespaces": {
+			namespace: "test1,test2",
+			want:      "(\"savedViews\":(\"n\":[\"test1\",\"test2\"]))",
+		},
+		"three namespaces": {
+			namespace: "test1,test2,test3",
+			want:      "(\"savedViews\":(\"n\":[\"test1\",\"test2\",\"test3\"]))",
+		},
+	}
+
+	for name, tt := range tests {
+		t.Run(name, func(t *testing.T) {
+			assert.Equal(t, tt.want, constructPageStateParam(tt.namespace))
+		})
+	}
+}