PLT OF A PIPER ARROW; PA28-180; OVERSHOT BASE LEG AND FLEW THROUGH FINAL FOR AN APCH TO THE WRONG PARALLEL RWY RESULTING IN TWR INTERVENTION AND A GAR.

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I WAS CLRED TO LAND ON RWY 8L WITH TFC ON A 6 MI FINAL. I WAS ON BASE LEG WHEN TWR INFORMED ME THAT I OVERSHOT/EXTENDED MY BASE THROUGH FINAL APCH FOR RWY 8L. I DID NOT REALIZE AT THE TIME THAT MY APCH/RWY IN SIGHT WAS; INADVERTENTLY; FOR RWY 8R. TWR TOLD ME TO DO A GAR WHICH I COMMENCED TO DO; OFFSET TO THE L OF RWY 8R. I DID NOT UNDERSTAND INSTRUCTIONS; FLY HDG 030 DEGS. I ASKED FOR TWR TO REPEAT ONCE OR TWICE. I WAS TOLD TO CALL TWR UPON LNDG; AT WHICH TIME I WAS INFORMED THAT AN FAA DEV (IE: TICKET; TFC) WOULD BE ISSUED. I TOLD TWR PERSONNEL THAT I WOULD PROVIDE ANY INFO AFTER DISCUSSING WHAT I SHOULD DO WITH A LEGAL ADVISOR. PERFORMANCE PLT: TRYING TO REVIEW WHAT HAPPENED AND WHY. PERHAPS I WAS COMPLACENT AS HAVING LANDED AT THIS ARPT MANY TIMES OVER THE PAST 12 YRS AND FOR SOME REASON I DID NOT REALIZE I WAS SETTING UP FOR RWY 8R NOT 8L. I WAS CONCERNED WITH EXPEDITING MY APCH; WHICH WE ARE NORMALLY TOLD TO DO; SO I WOULD NOT HINDER THE ACR ON FINAL. (IN MY OWN WAY; TRY TO ENHANCE GA AT SKY HARBOR.) I WAS CONCERNED ABOUT THE XWIND COMPONENT; ATIS RPT WIND AT 140 DEGS; 11 KTS GUSTING TO 16 KTS; AT LNDG; WIND WAS AT 6-7 KTS. FOR SOME REASON WHAT I SAW DID NOT REGISTER WITH ME THAT I WAS APCHING THE WRONG RWY.