Aulas confirmed on Wednesday to French television channel Canal+ that Premier League side Newcastle are one of the clubs interested in the forward, who scored 16 goals in 37 games last season and has just one year to run on his current contract.
However, the Magpies look to have competition in their bid to sign the striker, with Aulas posting a message on Twitter stating three clubs have shown interest in the 27-year-old France international.
Replying to a question if there had been any interest for Gomis, Aulas said: "Yes at least 3".
It comes after Aulas told Canal+ that "there is an interest of Newcastle for Gomis. We wait from them to come to us with an offer".
Newcastle boss Alan Pardew was reported as saying earlier in the week that he is keen on the striker, although whether the decision of Magpies' frontman Papiss Cisse to wear the club's strip branded with a pay-day loan sponsor today will cool the interest is unknown.