looks like a female. there are 2 things to look for, between the legs are femoral pores a "v" shaped group of dots that darken in mature males ,the other way is hemi penal bulges at the base of the tail. ive found that gently lifting the tail from behind is the best way to view them. i see neither of those. do a google image search of sexing leopard geckos for detailed pictures.
Kirk