This assumes you are familiar with the basic usage of the Gateway Migration Utility. Following is an example of how to list Cluster Wide Property named "foo".

/path/to/GatewayMigrationUtility.sh restman
-host apig.example.com
-port 8443
-username john.doe
-password f5VPX0yUJPg.m4BrjdgMv84UgktddJD3xA
-method GET
-path '1.0/clusterProperties'
-query 'name=foo'

Or the -argFile option can be used, to reduce the number of options that are used on the command line.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/clusterProperties'
-query 'name=foo'

Something like this should be returned. Notice the ID of the Cluster Wide Property is 1a5b56dfad45645645fd5464df65.

<l7:List>
  <l7:Item>
    <l7:Name>foo</l7:Name>
    <l7:Id>1a5b56dfad45645645fd5464df65</l7:Id>
    <l7:Type>CLUSTER_PROPERTY</l7:Type>
    <l7:TimeStamp>2019-03-29T00:55:11.088-05:00</l7:TimeStamp>
    <l7:Link rel="self" uri="https://example.com:8443/restman/1.0/clusterProperties/1a5b56dfad45645645fd5464df65"/>
    <l7:Resource>
      <l7:ClusterProperty id="1a5b56dfad45645645fd5464df65" version="1">
        <l7:Name>foo</l7:Name>
        <l7:Value>bar</l7:Value>
      </l7:ClusterProperty>
    </l7:Resource>
  </l7:Item>
</l7:List>

Here is how you would delete the Cluster Wide Property with ID 1a5b56dfad45645645fd5464df65.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method DELETE
-path '1.0/clusterProperties/1a5b56dfad45645645fd5464df65'