Display a maintenance page when a GTM pool member is disabled

When I use "equals" I get the following error in the logs:

 

TCL error: site_KA_check - can't use non-numeric string as operand of "!" while executing "if { not {[active_members -list ] equals "xxx.xxx.xxx.xxx" }} { HTTP::respond 200 content "

 

I get a similar error when I use the following: ] "xxx.xxx.xxx.xxx"

 

 

I also added in a line to show what the active members are, and they are from the LTM pool list, not the GTM pool list. Is there a way pull in the GTM members in a LTM Irule? Is what I am trying even possible?