With IPHost Network Monitor you can run simple snmp requests against a HP device in your network.
routeGateway
route Gateway
1.3.6.1.4.1.11.2.3.9.3.1.2.4.1.2
The address of an intermediate machine to send packets to. Note that this is a string and may be either a dotted decimal IP address or a domain name.
Back to hp-700rx MIB page.
IPHost Network monitor allows you to monitor routeGateway on Hewlett Packard device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.