Gan'arg Analyzer can be found in Blade's Edge Mountains [27.42, 68.55], researching the Apexis Relics and Apexis Monuments near Ogri'la. It is rumored a select few are trusted with the Schematic: Field Repair Bot 110G.
Notable drops Edit
Prior to Patch 2.4.3, they were referred as "Simon Unit" in the Combat Log. This is likely because the relics they guard start a Simon-like game