SELECT circuit FROM table_13642023_2 WHERE rnd = 5 AND gtu_winning_team = "#59 Brumos Porsche - Audi"
Di sirkuit mana tim pemenang GTU #59 Brumos Porsche - Audi di Babak 5?
CREATE TABLE table_13642023_2 (circuit VARCHAR, rnd VARCHAR, gtu_winning_team VARCHAR)