Unlock Verizon iphone for European carrier?

I have an Iphone 4S that i'm not using, Its from Verizon. Now id like to send this to my overseas Girlfriend so we can facetime and well because id prefer she have a smart phone.

How can i get this unlocked so i can mail to her and it will be ready to activate in her country?

Added (1). Praktic, I do a ton of traveling we have been together for over a year now my relationship is none of your business…

Girlfriend IS ALWAYZ OK IN ONES OWN COUNTRY!
AVOID THE Girlfriend IT CAN SAVE ALOT OF your ENERGY and WILL NOT LET you XPLORE THESE STUPID QUES!

You don't need to unlock it… Verizon Iphone 5 is global ready… All she needs to do is pop in a sim card in the country she is in…