I assune you were asking about the "referee school"" George hosts at James Madison U. in Harrissonburg, VA. Last year it was held 19-22 June--the school usually occurs at the same time every year. This year, George will be at the NBDL tryout camp the following weekend in Atlanta. I assume he will still hold his school at JMU. I will try to contact him or one of his staffers to find out and let you know.
You may try going to his website
www.toliverbasketball.com to ask him when the camp will be.