CREATE TABLE table_851 ("Rnd" FLOAT, "Circuit" TEXT, "GTO Winning Team" TEXT, "GTU Winning Team" TEXT, "TO Winning Team" TEXT, "TU Winning Team" TEXT, "Results" TEXT)

Who was the GTO winning team in round 5 when the GTU winning team was #59 Brumos Porsche - Audi?
SELECT "GTO Winning Team" FROM table_851 WHERE "Rnd" = '5' AND "GTU Winning Team" = '#59 Brumos Porsche - Audi'
SELECT "GTO Winning Team" FROM "table_851" WHERE "GTU Winning Team" = '#59 Brumos Porsche - Audi' AND "Rnd" = '5'