CREATE TABLE table_52588 ("Race" TEXT, "Length" TEXT, "Class" TEXT, "Circuit" TEXT, "Date" TEXT)

On what circuit is there a class gts-2 race that takes place on May 27?
SELECT "Circuit" FROM table_52588 WHERE "Date" = 'may 27' AND "Class" = 'gts-2'
SELECT "Circuit" FROM "table_52588" WHERE "Class" = 'gts-2' AND "Date" = 'may 27'