If you have not tried gtasks in a while, you will find it has been improved greatly as of late. Gtasks is an app that syncs with Google tasks. It now has automatic sync.
Just recently the dev of that app worked with the dev of Pure Calendar in providing the synced tasks to the Pure Calendar Agenda Widget. The dev of Pure Calendar did a nice job of grabbing and displaying these tasks along with any scheduled appointments from the calendar. Tasks have a little blue dot beside them while calendar items have a vertical bar. Late tasks show up in red.
If you haven't used the Pure Calendar Agenda Widget, give it a try. You can adjust the transparency along with a large host of settings which makes the widget look extremely nice, IMO.
gTasks - beta v0.3.33m Application for Android | Productivity