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_30060356_3 (gt4_cup_winner VARCHAR, circuit VARCHAR)

### Question ###
List all GT4 Cup winners played on the Spa-Francorchamps Report.

### Accurate SQL ###

SELECT gt4_cup_winner FROM table_30060356_3 WHERE circuit = "Spa-Francorchamps Report"