For security reasons, GoToMyPC will disconnect you if there is no keyboard or mouse activity for a certain period of time. The default setting for Pro and Personal users is 15 minutes, but it may be increased up to 9999 minutes.

Configure security time-out on Windows

1. In your computer system tray, right click on the GoToMyPC icon  and click Preferences. 
2. In the Security tab, you can change the minutes of inactivity before GoToMyPC disconnects you. Click OK.
3. If you are on a Corporate account, the maximum time-out setting is managed by your administrator. 

Configure security time-out on Mac

Changing the time-out setting for Mac host computers is not available at this time. The default setting is 30 minutes. Mac client computers will honor the time-out setting of the Windows host computer.