I hadn't heard of the MTR tool before, but it appears to be similar to the pathping Windows utility I mentioned in my book. It combines the ping and traceroute commands to pound each router along the path to a destination, and measure min/max/average transit times at each hop in an attempt to find where latency and/or packet loss are being introduced in the network path, and also measure jitter. MTR doesn't seem to be included with Gaia 3.10, but similar to the strace utility I mentioned in my book, there is a precompiled copy of MTR you can download from here:
http://vault.centos.org/3.8/os/x86_64/RedHat/RPMS/mtr-0.52-2.x86_64.rpm
Not sure if you can make it work under Gaia, and be warned that adding additional software to the Gaia OS is not supported by Check Point.
Gateway Performance Optimization R81.20 Course
now available at maxpowerfirewalls.com