What type of connector is this Velodyne interface box GPS connector?
Page 35 of its user manual "Appendix B : Interface Box" shows the schematic of the interface box, where the connector is labelled "SM-068B-SRSS-TB".

First Google hit on SM-068B-SRSS-TB is its Digikey entry.

What you probably wanted to ask is what connector plugs into it ... hopefully you can get that from Digikey or the manufacturer, JST.