[Lombra]

I don't really understand what you're looking for, but I can tell you that this:

Test.About._G[Test]

works out to be equivalent to this:

Test["About"]["_G"][Test]

because when you're using dot instead of brackets, the key is intrepreted literally (or some other explanation that's terminologically correct)

You probably want this:

Test.About[_G[Test]]