JEAN Gabriel Mitterrand, the nephew of President Francois Mitterrand of France, will be attending Art Asia '93 in his capacity as owner of the JGM Galerie in Paris. The gallery was established by Mr Mitterrand in 1988 and specialises in modern sculpture from the 20th century. Mr Mitterrand will also use his visit to help promote the cause of modern sculpture in public places. ''During my visit, I plan to meet architects, developers, collectors and businessmen who will appreciate the works of my artists, and I hope that they will commission works which will contribute to the great architectural realisation now taking place in Hong Kong,'' he said. ''The great challenge is to encourage architects to allow sculpture back into their designs at the planning stage. ''The new conception of modern buildings makes this possible, but we need to convince the developers who ultimately control the overall budgets for projects. ''The point of outdoor sculpture is to connect with a great many people simultaneously - all those who pass by it. ''Paintings can be private but sculpture should touch a shared emotion. ''It is not enough simply to have an aesthetic objective, it must be charged with the memory of human emotions and spirituality.'' Mr Mitterrand was anxious to see the late Elisabeth Frink's two bronze-cast water buffaloes outside the Forum in Exchange Square. Ms Frink died from cancer last April aged 62. She visited Hong Kong in 1988 to unveil the sculptures commissioned by Hong Kong Land. ''I knew Elisabeth and showed some of her pieces in my gallery,'' said Mr Mitterrand. ''She was a fine sculptor with a strong Celtic feel to her work. Her early death was a great loss. ''The true qualities of strong sculptors are often only recognised late in their careers, like Henry Moore. ''Every piece of sculpture I sell represents a sound investment for the future. ''I want to promote the fact that the Hong Kong community can bring beauty to their homes and city through modern sculpture, while at the same time making a sound investment - in intellectual, aesthetic and financial terms.'' At Art Asia '93, Mr Mitterrand will be exhibiting a collection of modern sculpture never seen in Hong Kong. The artists represented by the gallery include Miro, Niki de Saint Phalle, Igor Mitoral, James Brown, Rembrandt Bugatti and Hans Arp.