When comparing Gqueues vs GTasks, the Slant community recommends GTasks for most people. In the question“What are the best to-do list apps for Android?” GTasks is ranked 33rd while Gqueues is ranked 41st. The most important reason people chose GTasks is:
Unlimited subtasks or sub sub tasks, as deep as you need, excellent for project work.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Smart queues are configurable
You have lots of ways to customize smart queues (such as where the tasks should be included from, from which dates etc.).
Pro Color Coding
It is incredibly helpful to color code queues providing immediate visibility and information. Also, the app can sort tasks in multiple ways and its easy to see and group tasks.

Pro Integrates nicely with Google apps
This app is designed to work specifically with Google apps.

Pro Unlimited subtasks
Unlimited subtasks or sub sub tasks, as deep as you need, excellent for project work.

Pro Synchronizes with Google tasks available natively in GMail
Seamlessly syncs tasks.
Pro dark theme available
Pro time reminder is supported

Pro Closing parent task closes sub tasks

Pro Available on iOS

Pro Works with Chrome's 'Google Tasks Panel' extension
Cons
Con Limited to use with Google apps only
Specifically developed for Google apps.

Con Free version is limited
Full access requires a yearly subscription.
Con Terrible widget
Con Pop up ads get in the way
The app frequently displays popup ads when you navigate the app, forcing you to pause to close them.
Con No recurring tasks fom completion
Con Does not support attachments
You cannot add attachments to tasks.
