Load Balance Cisco ASA AnyConnect WebVPN With GTM?

I am trying to use our GTM to redirect between two different ASAs at different datacenters. Is it possible to use the SNMP monitor to query the ASAs for CPU load and/or number of existing WebVPN connections, and have the GTM give out the correct IP to a DNS query based on the box that has the least current load? If not SNMP, how about a CLI script that returns a particular number (like CPU load over last 5 mins)?

 

 

Thanks in advance!

 

Patrick