GPL-3.0 License Intent

[lordofduct]

This project is also found here from the same author:
https://assetstore.unity.com/packages/tools/gui/off-screen-target-indicator-71799#description

On the Unity Asset Store the project is slightly different (older) and is under the 'Standard Unity Asset Store EULA' license. Where as here it is under the GPL-3.0 license.

What is the intent of the license? The GPL-3.0 license is a copyleft license which requires the application of the license of conjoined works. There are different interpretations of the license out there that have been discussed at length around the internet. Some consider the use of a plugin in a project forces the project to also be GPL-3.0, others consider it that plugins in something like Unity are not and only derived works are subject to it (i.e. if someone were to modify this project in part).

So I ask what is the intended behaviour of the license?

[jinincarnate]

you may use this project for any personal or commercial use and fork and modify the code as you see fit