Nomeie a soma de voltas para co-pilotos de Oliver Gavin, Jan Magnussen e classe de GTS com ano inferior a 2004.
CREATE TABLE table_name_17 (laps INTEGER, year VARCHAR, co_drivers VARCHAR, class VARCHAR)
SELECT SUM(laps) FROM table_name_17 WHERE co_drivers = "oliver gavin jan magnussen" AND class = "gts" AND year < 2004