No as a PR you would need to remain in Canada for the duration of the sponsorship process, only citizens can sponsor whilst living overseas.
You basically have 2 options:
1. Marry her before your PR is granted and inform your visa office. This would cause a delay on your approval as she would need to be added to your file, but this allow you to remain together the whole time.
2. You land as a PR then marry and apply to sponsor her through the outland or inland process. She would need to apply for a visitor visa, which risks being denied and so she may not be able to come to Canada during the process. Outland is faster - you should find a thread for your visa office to get an idea of the processing time. Inland is slower but she would be allowed to remain in Canada for the entire time, however both of these rely on her getting a visa.