AFTER DEALING WITH A LNDG GEAR PROB A LNDG IS MADE ON THE WRONG RWY.

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LNDG ON THE WRONG RWY. AT ABOUT 6 MI OUT; ATC HAD CLRED ME FOR VISUAL APCH L-HAND BASE TO RWY 6. AT THE SAME TIME I WAS PERFORMING MY BEFORE LNDG CHKLIST INCLUDING LETTING DOWN THE RETRACTABLE GEAR. MY GREEN DOWN LIGHT FOR MY GEAR DID NOT COME ON. I STARTED TO CYCLE THE GEAR. ON THE THIRD CYCLE; THE GREEN LIGHT ACTIVATED. I LINED UP WITH THE RWY AND CALLED ATC AND RPTED A 2 MI FINAL FOR RWY 6. ATC CLRED ME TO LAND. I LANDED THE AIRPLANE WITHOUT INCIDENT AND CLRED THE RWY. AT THAT POINT I REALIZED I HAD LANDED ON THE WRONG RWY. CONTRIBUTING FACTORS TO MY ERROR: THAT WEEKEND ALL RWYS EXCEPT RWY 30/12 AT PWK WERE CLOSED DUE TO RWY MAINT. NOTAMS RPTED ALL RWYS EXCEPT FOR RWY 30/12 WOULD BE CLOSED FOR THE WKEND. I HAD LANDED AND TAKEN OFF FROM RWY 12 A NUMBER OF TIMES OVER THE WKEND. IN MY PREOCCUPATION WITH MY GEAR PROB AND THE RWY CLOSURES; I DID NOT ANTICIPATE THE PREMATURE OPENING OF RWYS AND ALTHOUGH ATC CLRLY ANNOUNCED MY CLRNC FOR RWY 6; AND MY RPTING BACK RWY 6; MY MIND DID NOT REGISTER RWY 6 DUE TO MY EARLIER ACTIVITY ON RWY 12.