Download Git for windows
Open Git Bash
Type in "ssh-keygen -t rsa", and then press Enter button three times
You can find the public key in the "file id_rsa.pub" which located in C:/Users/yourname/.ssh/
Login your GitLab account, go to Profile Settings and then go to SSH Keys, and add your public key then everything is OK!
Add SSH Key to GitLab on Windows
原文：http://www.cnblogs.com/grandyang/p/4401298.html