You do not need to do anything in Zone runner.
Once your GTM and LTM are communicating over iQuery:
- On the GTM, add the new Virtual Servers under their respective LTM Server Objects.
- On the GTM, build a pool that includes these two LTM VIP IPs.
- On the GTM, build the WideIP using the pool and your new FQDN, test.wip.exmaple.com.
- Test the resolution by using dig/nslookup against the GTM Listener, for test.wip.exmaple.com.
- If all is good, put in CNAME.
One other thing, you will need A records on the DNS servers for the GTMs, to support the NS records.
Good Luck!