Hi Manuel
You should be able to drag the gadget to anywhere on the screen and as long as the agent has write access to their person object in CME the position will be remembered for the next login. The position is saved on the Annex tab of the Person object as 'gadget-statistics.window-location'.
If you find that this is not working for you please open a case with Customer Care and we can investigate for you.
Thanks
Troy Mortimer
Genesys Customer Care