It seems were still talking about two seperate things.
My original post highlighted that the content of GTO was not that usually seen in shonen manga (censored tits, drugs, violence, deeper themes than power leveling)
My point in a nutshell is that demographic should not, and does not, give any hint of the content of the manga. By your reply, anything could be considered shonen so long as someone believes it should be peddled to such a demographic, it is run in a shonen magazine, and contain's shonen "themes". Simply by its content, I would not consider GTO shonen based on what 'shonen' content is generally considered to be, or atleast by the standards you highlighted.