The gate line is in two sections. the east (right-hand as you enter) section serves platforms 1 - 2, whilst the other serves platforms 3 - 6.
At the time of our survey, the right-hand gates were the ones you needed in the right-hand gate line, though we found no pattern in the left-hand section.
It may be easier to use the bi-directional Wide Aisle Gates in the middle.
© 2009, Terry Robinson