In Gtmhub mobile app, you can find the tasks in main navigation. You can update the status of a task, but you cannot create new tasks or edit existing ones.
Perform the following:
Open Gtmhub mobile app.
In the main navigation, tap the middle button.
Tap a task that you want to update.
Select the new status of the task.
Select from To-do, In Progress, or Done.
The task status is updated instantly.