When two veterans of the Illinois attorney general’s office opened their own law firm last week, they took a calculated risk. Their new firm doesn’t have any clients. “We’re very close to procuring a couple of clients,” said Paul J. Gaynor. “We hope that will happen soon.” G&R Public Law Strategies opened Oct. 1 after Gaynor left the attorney general’s office and partnered with Jonathan A. Rosenblatt, who also worked as an assistant attorney general from 2007 to …