No, she would not be able to come to the United States once you petition for her. She would need to wait until the petition is approved. Only after the petition is approved can she apply for immigrant visa. Your girlfriend will require an additional step given she was subjected to expedited removal. She will need to request permission to reapply for admission. The entire process will take approximately 12 to 18 months. You can read more about petitioning for a family member at http://myattorneyusa.com/family-immigration.
Answered on Jun 13th, 2016 at 2:43 PM