From last year's collated data
[invite received - GWS
181 (91st%ile) 59/65/57, 6.62, (S1+S2= 124)
179 (89th%ile) 71/56/53, 99.80, GWS, (127)
177 (87th%ile) 67/70/40, 6.17, GWS, (137)
175 (84th%ile) 65/65/45, 6.00, GWS, (130)
[no invite yet - GWS
187 (95th%ile) 65/54/68, 6.00, GWS, (119)
181 (91st%ile) 51/70/60, unknown GPA, GWS, (121) ]
A few sub-90%ile overall got an interview yet a 95%ile GWS didn't, because their sections 1+2 was lower. Ignoring the small contribution from section 3 for simplicity the S1+S2 cutoff was around 122 = 91-92ish section %ile.
Translating this to UCAT Overall if that's what WSU is going to use it's equivalent to UCAT 90-91ish %ile. But 89 shouldn't give up hope yet.