Run a file from Ge game

Hi!
How can I run a file from Ge game?
A made a menu and if we click on Start game the menu program close(i made it) and the game open((exe or linux file)here is the problem...I don't know how can i make it)
How can I run a file from Ge game?
A made a menu and if we click on Start game the menu program close(i made it) and the game open((exe or linux file)here is the problem...I don't know how can i make it)