ATLANTA — Georgia gun owners can’t bring their weapons onto the grounds of public schools or public college campuses when two new laws take effect July 1, Attorney General Sam Olens said Thursday. A day after gun rights group Georgia Carry publicly said one of two new weapons laws allows people with permits to carry weapons in school zones, Olens released a three-page document that rejected the idea. Gun rights supporters said they expect gun-free zones in and around schools and public college campuses to be challenged in court, despite Olens’ guidance.