CREATE TABLE table_37436 ("Race" TEXT, "Length" TEXT, "Class" TEXT, "Circuit" TEXT, "Date" TEXT)

Which date was held at Laguna Seca Raceway, in class GTX/GTO?
SELECT "Date" FROM table_37436 WHERE "Circuit" = 'laguna seca raceway' AND "Class" = 'gtx/gto'
SELECT "Date" FROM "table_37436" WHERE "Circuit" = 'laguna seca raceway' AND "Class" = 'gtx/gto'