B767-200
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Distraction; Time Pressure
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification
Aircraft
Upon gear retraction EICAS message 'GEAR disagree' and 'gear doors' with advisory lights. Performed QRH procedures. Contacted Maintenance Control and confirmed return to base. Extended the gear early and had the same EICAS messages; and no green down and locked lights for the two main gears. Performed QRH procedure for Gear disagree with handle in down position and did an alternate gear extension. The time lapse before we got the left green light was approximately four minutes; and we did not get the right green light for approximately an additional 1 1/2 minutes. The timing seem off to us so out of an abundance of caution we did a low approach so the Tower could confirm that all the gear was down. ATC advised us that they had equipment standing by.  We came around for another approach and landed with the gear doors open.
B767-200 Captain reported a gear door problem and landed with out incident.