CREATE TABLE table_31012 ("Rnd" TEXT, "Circuit" TEXT, "AP Winning Team" TEXT, "BP Winning Team" TEXT, "CM Winning Team" TEXT, "CP Winning Team" TEXT, "DM Winning Team" TEXT, "DP Winning Team" TEXT, "EM Winning Team" TEXT, "EP Winning Team" TEXT, "FM Winning Team" TEXT, "FP Winning Team" TEXT, "GM Winning Team" TEXT, "GP Winning Team" TEXT, "HM Winning Team" TEXT, "HP Winning Team" TEXT, "Results" TEXT)

Who the GM winning team when the EP winning team was #37 Porsche?
SELECT "GM Winning Team" FROM table_31012 WHERE "EP Winning Team" = '#37 Porsche'
SELECT "GM Winning Team" FROM "table_31012" WHERE "EP Winning Team" = '#37 Porsche'