Hmm, I can see nothing, at all, about this unusual situation, on the linked question.
– FattieJun 16 '15 at 14:40
@Joe Blow - From the linked answer: If the parenthetical material is part of another sentence, place the period outside the closing parenthesis.
– Laconic DroidJun 16 '15 at 15:11
Your question seems to be based on the assumption that JCG should properly be followed by a period to indicate that it is an abbreviation. That is incorrect. It would generally be rendered as "JCG" without periods, or as "J.C.G." with a period after each letter.
– phoogJun 16 '15 at 15:17