I cant say I have ever heard of MT advocating female clergy, but you never know. However, I do think that contemporary advocates of female clergy - as well as the usual Church critics - would have definitely made sure we ALL knew about it, if it was a genuine claim. If such an important, devout and well known Catholic held unconventional views regarding Catholicism, surely it would be common knowledge?
She and her legacy have, unfortunately, often been the target of mud-slinging polemicists (eg Christopher Hitchins) who have besmirched her memory (calling her a fraud etc) to make money/fame from those who like hearing bad things about religion, and specifically Catholicism. Maybe this view has been falsely attributed her to court controversy? But this is purely speculation on my part.
I would be pretty confident that she did not have any view of “gay marriage”. That issue has only really risen its head in the last decade - post millenium. E.g. in Britain, civil partnerships for gay people were introduced in 2005, and they are currently pushing for religious “gay marriage” to be permitted. MT died in 1997, when all this still seemed like pie in the sky and was not even discussed.
For both points, remember that she was obviously a devout and traditional Catholic and so through that alone it is unlikely she would have had any unconventional views on such matters.
So, I think whoever said these things is kidding you, or bending the truth, but do let us know if you find out anything.