I also do not see much conflicting information here. It's pretty clear:
- marry (having a child will help, but, well... ) for getting permanent visa/residency,
- possibly naturalisation (possible after 5 years, if you behave well
)
Do not know if it's necessary to be naturalised for a flying job, but it's certainly the case for any government related employer.
Besides, both me and alemaobaiano are living here, and both suggest to (at least) try to convince your girlfriend to move to Australia... hmmm ....
Contacting Brasilian Consulate and/or ANAC is certainly worthwhile.
You're welcome to contact me directly if you want more of my opinion about Brasil as a living place, I do not want to start a discussion about this here in the forum.