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_39 (gauge VARCHAR, locomotive VARCHAR, status VARCHAR, owner VARCHAR)

### Question ###
What is the Gauge of Locomotive G534 Owned by Aurizon which has a Status of Operational?

### Accurate SQL ###

SELECT gauge FROM table_name_39 WHERE status = "operational" AND owner = "aurizon" AND locomotive = "g534"