Update GCE.md
Update GCE.md
quater/calico-containers,quater/calico-containers,projectcalico/calico-docker,projectcalico/calico-docker,caseydavenport/calico-containers,caseydavenport/calico-docker,caseydavenport/calico-docker,caseydavenport/calico-containers,insequent/calico-docker,projectcalico/calico-containers,insequent/calico-docker,Metaswitch/calico-docker,Metaswitch/calico-docker,projectcalico/calico-containers,projectcalico/calico-containers,caseydavenport/calico-containers