Hey,
I am currently a med student at the University of Sydney. I assume that your girlfriend has already completed her undergraduate degree in medicine as what you have just said implies that she has already planned on specialising. I'm fairly certain Avondale does not offer any neuro related degrees, their science faculty might as a unit that's included in undergraduate psychology but Avondale does not have a Medical faculty, so your girlfriend might have given you wrong information to relay here, either that or you could help us out by giving us the exact name of the degree she plans to attend. As far as I'm concerned, there are only a few (I hesitate to say this) relevant universities that offer medicine and they are based in the big cities. Avondale is in Tamworth and is a good two hours away from Sydney, a small scale university. Tamworth is a great place, it's relatively quiet, peaceful and enjoys the generally good Australian weather. There isn't much city/urban life so if she enjoys the rush and buzz, it's not the greatest place. Either way, I'm sure she'll have a great time over here, however, I'm not sure what opportunities she might have in medical field (especially her dreams of becoming a neurosurgeon) if she graduates from Avondale. With that said, I do not know what the situation is in Canada so the best advice I can give is for her to do more research!
Hope that helped