Does the v on a gecko mean its a boy or a girl?

There is a "V" shape in both males and females. Above the V (which is called the vent) are very small scaled outlining the breeding organs. In males, these scales are marked out with a black circle in the middle, these are called pores. Only male geckos have pores. Most hobbyists purchase a jewelers loup to determine the sex of young geckos.