Take the site offline in GTM

I am writing a script to take site offline in GTM using F5 iControl. We have two sites and each site has GTM connecting to LTM which acts as a load distributor for the server pools in each site. The virtual server in WideIP pool in GTM represents the virtual server VIP for a certain server pool in LTM in each site. We configured GTM to auto-discover the virtual servers in LTM.

The script I am working on is to disable the virtual server in WideIP pools to take the site offline. Since I only need to take some WideIP pools/virtual server offline but not all in GTM, I must keep a list manually which lists out the WideIP pools/virtual servers to be taken offline.

I am wondering if there any other ways to do it so that I don't need to maintain the list manually. I was checking for Data Center configuration but I don't see any virtual servers showing up in Data Center in GTM. Any suggestions? Thank you.