With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgmGdoiGmTable
Cisco GDOI Management Gdoi Gm Table
1.3.6.1.4.1.9.9.759.1.2.2
A table of information regarding GDOI Group Members (GMs) locally configured on the network device being queried. Note that Local Group Members may or may not be registered to a Key Server in its GDOI Group on the same network device being queried.
Back to CISCO-GDOI-MIB MIB page.
IPHost Network monitor allows you to monitor cgmGdoiGmTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.
