I used to launch git gui within my cygwin console without any problems but since I updated cygwin I\'ve got the following error message:
$ git gui
Applicatio
After following the 4 steps given by me_and and tititou36, you may still have issues of the XWin just die after you started the XwinServer.
The reason is it relies on a CygWin terminal/console, which is the host, and the Xwin dies if there is no CygWin console.
The solution for this is:
Start a Cygwin console. (you can make it automatically start by putting mintty command into the file .startxwinrc under your cygwin home directory.