As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB-OUT WHEN SELECTING GEAR UP RECEIVED "GEAR DISAGREE" EICAS MESSAGE. RAN QRH DECLARED EMERGENCY AND RETURNED TO AIRFIELD. MSP MAINT INSPECTED LANDING GEAR FOUND PROX SENSOR OUT OF ADJUSTMENT. ADJUSTED PROX SWITCH AND PERFORMED OPERATIONAL CHECKS PER AMM.