As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, REDLIGHT IN GEAR HANDLE CAME ON AFTER GEAR RETRACTION. NO OPEN DOOR INDICATIONS ON SYNOPTIC PAGE OR ASSOCIATED CAS MESSAGES WERE OBSERVED. RED LIGHT REMAINED ON THRU FLT. R & R DEFECTIVE RT MAIN LANDING GEAR DOOR SWITCH AND SYS OPS TESTED IAW G550 AMM 32-61-00 AND 32-60-00 ALL TESTS NORMAL NO FAULTS NOTED.