Recently bought a Honda Vezel 2015 model and it came with Gather VXM-155 VFNi but I can't change the gps or time or language.can anyone tell how to set location to Pakistan as it is Japan right now and i can't change the time or language
You can't change the time and language. Time is based on Japanese time zone and can have +/- 4 hours variation and nothing more.
Disconnect the GPS antenna from unit back. Once you disconnect, restart the ignition you will find time setting in combination meter menu.
