B737 Next Generation Undifferentiated
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Flight Crew Last 90 Days 149; Flight Crew Total 615; Flight Crew Type 615
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance; Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft
Upon takeoff from ZZZ. After completing after takeoff flow I noticed red/green left gear indicators on. I informed the Captain and completed after takeoff checklist. Captain remained at aircraft controls with autopilot on. I referenced QRH and landing gear disagree procedure while Captain communicated with Maintenance and Dispatch I informed ATC of speed requirements during climb. We completed the steps in the 'gear disagree' procedure and opted to continue to ZZZ1 and [request priority handling] with ATC. We checked hydraulic levels and they were normal. We discussed our options regarding any subsequent problems we might experience and Captain briefed me on his configuration plan for the aircraft on arrival and landing into ZZZ1. Maintenance and Dispatch responded to our choice of options and we pressed on to ZZZ1. Captain flew an uneventful arrival and approach into ZZZ1 and the landing gear lowered normally with all green indications. Maintenance Technicians met us at gate.
B737 First Officer reported left 'red/green landing gear disagree light' illuminated on departure; but opted to continue the flight.