If we define intelligence as the ability to solve complex problems in complex environments then there is no objective way to measure competence or intelligence outside of society. If a gene makes you more attractive and because of this attractiveness others respond better to you and this makes you better able, with the help of others, to solve problems then this gene really has made you more intelligent. (This is different from this beauty gene causing others to falsely perceive you as being better able to solve problems than you really are.)