This article is for v6 of GogTasks. For older versions: Version 5 or Version 4 and earlier.
Select the new folder and create a couple of tasks.
Check that GogTasks is set up in Folder mode and to sync Both ways. Then Filter so that the only folder you set up for synchronization is the newly created "Test"-folder from Outlook. Google shall have no folders checked:
Click synchronize now (button in the Add-in tab for Outlook 2010 or from the Tools menu in Outlook 2007). Verify that GogTasks reports one list and two tasks to be created at Google. Click Commit if that is the case.
Open GMail, Google Calendar, or as I prefer - the Google Tasks Canvas to view the tasks at Google. You shall now have a new list with two tasks. Modify one of them by for instance marking one as complete
You may now want to revert to standard settings where you synchronize all folders or a set of selected folders.
As a side note, you may now notice that in the Filtering tab of the Preferences tab of GogTasks settings, the newly created folder "Test" is now ticked for synchronization also at Google. This is standard behaviour whenever you create a new folder in either of the locations and synchronize for the first time.