How to implement this event tracking to google analytics module
The GA Event Tracking module is designed to react to a number of different binded JS events. You're limited by what DOM events that jQuery can bind to. As such, there is no settimeout event. 

One solution that comes to mind is adding some custom JS to the standard GA module. Go to configuration page under the Custom Javascript Code in the Advanced Settings fieldset. There you can add what custom JS needed to trigger your setTimeout GA event.