Display a maintenance page when a GTM pool member is disabled

From what I am reading it is not possible to make a direct query from an LTM irule to the. Is it possible to run a TMSH command in an Irule? If soO I could do something like this:

 

tmsh show gtm pool $1 detail |grep disabled -B 4 |grep "Pool Member"

 

 

Is this possible?