Thanks Stefan.

I am able to use pageant.exe for key based login.

I have few doubts , please clear

1- Is screen sharing possible in x2go session, If I want to share my screen to other x2go user through broker ? He will login with my id and password.

2- one to one Desktop Access ?  If multiple session are added in brokers profile list, it shows to every user who log in broker server with ssh user. 

Regards Jyoti Kumar