MS ToDo has a great feature where anything preceded by the "pound" character (#) becomes a tag and if you tap on it it automatically builds a list of all other entries having the same tag, whether tasks, subtasks, or notes.
E.g. if I type "Jack phone call #Today" and then tap on #Today, it will show me a list of all task entries containing the tag #Today, whether in Subject, Subtask title, or in Notes.
This is a very useful feature, and I think GT could benefit from having similar functionality.