Antoine Gigal is a French researcher, probably best known for her work on the pyramids of Sicily described on her multilingual and well illustrated website(a). Her first love is clearly ancient Egypt, a passion that is evident throughout her website.*She includes an interesting article on the method used to build the Great Pyramid proposed by Hasan Sayid Ahmad, which involves the use of sledges in the internal ascending passage(d).*
She has only touched on the subject of Atlantis, apparently accepting its existence without involving herself in discussing any specific aspects of the story. An example of this is to be seen in her article on the Richat Structure(b).
Gigal was also a founder of the Giza for Humanity website(c).
*(c) http://www.gizaforhumanity.org/honorary-members/antoine-gigal/ (Link broken July 2018)