Yes, its content appropriate for japanese children since they weren't raised with ancient vestiges of puritan bipolar attitudes about sex
Seriously, there's little in Girls Bravo that *really* is inappropriate -- its just silly, bawdy humor that involves skin and embarrassment.
Kanokon, on the other hand, might be up for some debate as to "kid appropriate" even in Japan,
but most industrialized countries outside the US are more concerned about kids viewing violence than skin.