GNU GPL v2 question [Vue.js]

Gantt
#1

hello in my project i want ues gantt , i dont need the use gantt task type
https://docs.dhtmlx.com/gantt/desktop__task_types.html
but some task has child task，is it need PRO edition Or GNU GPL v2 is ok？

#2

Hello,
You can use the GPL edition only if your project is also licensed under the GPL or a compatible license:
https://dhtmlx.com/docs/products/dhtmlxGantt/#:~:text=an%20open-source%20(-,GNU%20GPL%20v2,-)%20project%20and%20you
You don’t need to get PRO edition of the Gantt to use tasks with child tasks. But the PRO edition of the Gantt allows using more features that are not available in GPL edition. You can check the article:
https://docs.dhtmlx.com/gantt/desktop__editions_comparison.html