What happens to the old and not so pretty in that world...
I must admit that it has been awhile since I have read my books and I can not answer your questions as to what happens when goreans get old, if they do, or for that matter where are the children in the books. However I am sure there are many out there that can answer those questions by quoting passages from one of the books.

I find it rather amusing though that there is a whole sub culture of rules based off a book.
Actually it is based off a whole series of books just like the Bible.

The Bible, the Koran, the Torah, etc. are used by many cultures around the world today. Yes, to those outside the influence of the culture that uses the books as a basis for its lifestyle it can appear amusing that others do use them in that way.

The Bible alone has spawned many sub cultures that disagree with each other yet they all use the same book as the basis for their lifestyles.

In a city near where I live we have the headquarters of an entire culture of people who use a sci-fi book written by L. Ron Hubbard as the basis for their lifestyle called Scientology. It has many members like Tom Cruise, John Travolta, etc. who are believers and it is spreading around the world.

I am not disrespecting anyone’s way of validate their lifestyle nor their choice of rites to formalize their choices. I have noticed that many people who claim to follow the Gorean roles can be rather ridged and judgmental towards others who choose to create their own rules and roles.
This part I can address directly as I have seen this first hand many times.

The mere mention of Gor or an interest in it always brings laughs when around the mainstream BDSM community. The true masters of BDSM will line up to try to be the one that can debunk anyone elses ideas of using it as a possible basis in a BDSM lifestyle.

However, that same group of people will not laugh at someone in their group of "real" BDSM'ers who wants to cross dress, practice infantilism, or any number of the different lifestyles which fall under the BDSM umbrella.

Yes, Goreans can be ridged and judgmental towards others. They have faced years and years of persecution from the very people who should have embraced them and invited them into the fold. It seems rather strange to me that if I were to get a sexual kick from balloon play I would not be ridiculed but welcomed by the BDSM community at large, but not so for the followers of the gorean lifestyle.

Some day we as people must realize that everyone has their own path in life and we should not ridicule them for it but congratulate them for finding their way, even when it does not match the way we have chosen for ourselves.