Hi @Dramaticv,
I am a current student and tour guide/ambassador for the program. The Dual BA Program is geared toward graduating high school students, and students in the program are typically traditionally-aged, which is why it is very rare for current GS students to transfer into the program. However, you could look at study abroad opportunities in France and at Sciences Po, which are options for current GS students. The best would be to speak with your academic advisor, and staff members at the Office of Global Programs. https://columbia.studioabroad.com/
Laetitia