MD-80 Series (DC-9-80) Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Flight Crew Executed Go Around / Missed Approach
Aircraft; Environment - Non Weather Related
Course Deviation due to inaccurate GPS Map Shift. We went around also due to an Unsafe Gear indication.
Air Carrier Captain reports loss of GPS information during approach to Runway 5L at MMMX. Unsafe gear also occurs later in the approach resulting in a go-around.