Package planner

A graphical project management tool

https://wiki.gnome.org/Apps/Planner

Planner is a visual project management application which allows users to
manage several aspects of a project, including schedule tracking using
Gantt charts.

You should install Planner if you wish to manage schedules, allocate
resources, and track the progress of your projects.

General Commands
Command Description
planner Project Management application for GNOME