I don't get it. How do you know that GP is shadowbanned? The post looks just like a normal post to me; I'm not even sure what it means for it to be dead.
Because "the system" might have made a mistake. And even if the shadowban was warranted at some time, the poster might have improved their conduct in the meantime and should be given another chance.
Usually, when I see a reasonable but dead comment, I vouch for it. If the commenter is shadowbanned and their other most recent comments are also reasonable and civil, I (sometimes) alert them to their status.