Due to the limits of nesting quotes, I will take the liberty of paraphrasing:

1) George C: Why would anyone care if a parent calls their child/ren profoundly gifted (PG), when the child/ren is/are not tested and reported to be profoundly gifted?

2) Val, quoted upthread:
Originally Posted by Val
I do care, because making a claim about being "PG" when it isn't true can lead to all kinds of problems. For example, if people are fabricating giftedness, their posts can't be trusted. Yet we can't know who's making it up, and so parents here may be believing advice based on experiences that never happened. This could tend to harm their children rather than help them.

Also, if a false claim of giftedness is made in real life, it can make teachers cynical when an actual HG+ kid comes along. How many of us have had to convince teachers that our kids really are gifted in the face of a belief that parents make it up? That belief isn't formed in a vacuum.
...
(And if anyone here is fabricating giftedness, please stop that.)
3) dusty to George C, and indigo to George C: Why would you not care?

4) George C, answering why unsubstantiated claims of PG do not bother him:
Originally Posted by George C
Originally Posted by fjzh
... Will I walk around calling her PG based on her acceptance? Nope...
Indigo, this is why it doesn't bother me.

George C, Please note the poster which you quoted is not a person calling a child PG.