After installing GogTasks, you will find it's buttons in the following places:

Outlook 2003/2007	Outlook 2010

Now click Settings and the form shown below will appear. The first thing you would want to do is enter your credentials. Click the "Login" button as shown:

This will open an in-app browser window which will navigate you to Google's authentication pages. Follow the on screen instructions to log in and associate a Google account with GogTasks.

Enter your credentials and click log in. (The instructions will be in your language).

Confirm that you want to associate your Google account with GogTasks.

Note that if for some reason this procedure fails, there is a backup solution by using the link at the bottom of the form saying "Go" followed by entering the pin code given by Google manually by clicking "Enter code"

When you click Confirm here, control will be returned back to GogTasks and you should see that GogTasks is authenticated:

Categories and lists

When authentication is done, the next thing you want to do is set the list to sync if you're running trial mode. This you do by clicking the "Change" button.

More on lists and categories, regardless whether you're running full or trial mode is documented here

Synchronization

When you're done, you can try your first synchronization by clicking "Synchronize now". At later points you can make GogTasks synchronize automatically - you set up this under the preference tab - or you can choose to synchronize manually.

The sync button is also available from the Tools menu in Outlook 2003/2007 or from the Add-ins tab in Outlook 2010. See pictures at the top of this page.

Note that in Outlook 2010 you have a nifty feature that allows you to have a quick access button to GogTasks sync in the title bar like this:

You can set this up by going to the menus File > Options > Quick access toolbar, select "Add-ins" from the "Choose commands from"-dropdown, and add "Synchronize now" to the toolbar.

Troubleshooting

If you're having trouble getting synchronization working, please read the Performing a test run article, which describes step by step how to test synchronization in trial mode.