With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGtpVersion
Cisco GPRS Tunneling Protocol Version
1.3.6.1.4.1.9.9.188.1.1.2
The highest gtp version supported by the GSN. When the value is, version0 - GTP v0 is supported, version1 - GTP v1 and GTP v0 are supported.
Back to CISCO-GTP-MIB MIB page.
IPHost Network monitor allows you to monitor cGtpVersion on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.