Seventh sign of the 7th sign

The Monkey spontaneously ran off the letters "A-B-C-D-E-F-G" today.

Later, he counted "1-2-3-4-5-6-7."

Although he can spell/count along with some of the higher letters and numbers, that is the highest of each that we have heard him go all by himself.

But is there some special significance that "G" is the 7th letter? Was he speaking in code?