ACFT LANDED ON WRONG RWY AT FCM.

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I WAS INSTRUCTED BY ATC AT FLYING CLOUD TO LAND ON RWY 28R. I LINED UP AND LANDED ON RWY 28L. THERE WAS NO TFC IN THE PATTERN FOR RWY 28L; SO NO ONE HAD TO TAKE EVASIVE ACTION. THE FLT LEADING UP TO THE RWY INCURSION WAS DIFFICULT AS I WAS ATTEMPTING TO FOLLOW A GPS THAT I WAS UNFAMILIAR WITH. THE GPS WAS WORKING PROPERLY; BUT I WAS READING THE INFO INCORRECTLY. THIS GOT ME OFF COURSE AND SOMEWHAT DISORIENTED. AS I APCHED THE FIELD; AFTER GETTING BACK ON COURSE; I BELIEVE THAT ATC CHANGED MY RWY FROM RWY 28L TO RWY 28R AND I RESPONDED BUT DID NOT MENTALLY MAKE THE CHANGE AND; THEREFORE; LANDED ON THE WRONG RWY. CONTRIBUTING FACTORS: INITIAL DISORIENTATION FROM BEING OFF COURSE. CHANGE IN RWY ASSIGNMENT. NOT THINKING THROUGH THE ATC INSTRUCTIONS AND NOT WRITING DOWN THE RWY ASSIGNMENT. CORRECTIVE ACTION: LISTEN CAREFULLY AND WRITE DOWN THE RWY ASSIGNMENT. MAINTAIN PRESENCE OF MIND AND COMPOSURE. HUMAN PERFORMANCE CONSIDERATIONS: IN MY MENTAL APCH PLANNING; I LOCKED ON TO ONE VISION OF THE ARPT AND DID NOT ADJUST WHEN THE RWY ASSIGNMENT WAS CHANGED. BEING A RELATIVELY NEW PLT WAS ALSO; I THINK; A CONTRIBUTING FACTOR; ALTHOUGH ALL OF MY FLYING HAS BEEN DONE OUT OF FLYING CLOUD.