This assumes you are familiar with the basic usage of the Gateway Migration Utility. Following is an example of how to list every policy in an API Gateway.

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

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/policies'

Or, a single policy can be returned by including the policy ID.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/policies/ed470defe8384b2fdfcb701c3623de7a'

Or, you can use the -query option to return a single policy by including the name of the policy.

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

versions can be included to return each version of the policy.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/policies/ed470defe8384b2fdfcb701c3623de7a/versions'

Each version will have a unique ordinal number, such as 1 for version 1, 2 for version 2, et cetera.

<l7:ordinal>1</l7:ordinal>

The ordinal number can be used to return a specific version of the policy.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/policies/ed470defe8384b2fdfcb701c3623de7a/versions/2'

The -response option can be used to output the XML to a file.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/policies'
-response /path/to/myPolicies.xml

Something like this should be returned.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<l7:List xmlns:l7="http://ns.l7tech.com/2010/04/gateway-management">
    <l7:Name>myPolicy</l7:Name>
    <l7:Type>POLICY</l7:Type>
    <l7:TimeStamp>2020-08-29T21:13:52.094-05:00</l7:TimeStamp>
    <l7:Link rel="self" uri="https://api.example.com:8443/restman/1.0/policies?name=myPolicy"/>
    <l7:Link rel="template" uri="https://api.example.com:8443/restman/1.0/policies/template"/>
    <l7:Item>
        <l7:Name>myPolicy</l7:Name>
        <l7:Id>ed470defe8384b2fdfcb701c3623de7a</l7:Id>
        <l7:Type>POLICY</l7:Type>
        <l7:TimeStamp>2020-08-29T21:13:52.094-05:00</l7:TimeStamp>
        <l7:Link rel="self" uri="https://api.example.com:8443/restman/1.0/policies/ed470defe8384b2fdfcb701c3623de7a"/>
        <l7:Resource>
            <l7:Policy guid="ed470defe8384b2fdfcb701c3623de7a" version="2">
                <l7:PolicyDetail folderId="0000000000000000ffffffffffffec76" guid="227afbfd-768c-4a41-a0d9-c40924be0d4c" id="ed470defe8384b2fdfcb701c3623de7a" version="2">
                    <l7:Name>myPolciy</l7:Name>
          </l7:Policy>
        </l7:Resource>
    </l7:Item>
</l7:List>