Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_17 (laps INTEGER, year VARCHAR, co_drivers VARCHAR, class VARCHAR)

### Question ###
Name the sum of Laps for co-drivers of oliver gavin jan magnussen and class of gts with year less than 2004

### Accurate SQL ###

SELECT SUM(laps) FROM table_name_17 WHERE co_drivers = "oliver gavin jan magnussen" AND class = "gts" AND year < 2004