Yes, it is unique in the design of the program, not necessarily the rules for transferring credit. Many universities will make you take their intro writing course. The reason is because writing is such an essential skill to have for almost every academic discipline, so a university wants you to be tuned in their approach to academic writing.
As for your question: I'm not quite sure, since you already have a BS (correct?). You wouldn't exactly be a transfer student at this point, so you might be able to apply directly to the degree program and not worry about GE. BUT, and I could be mistaken here, Purdue does not allow you to use credits if they have already been applied in obtaining a degree. This is the case in graduate programs. I do not know if it matters for obtaining a second (or third) BA/BS. Only an academic adviser could say for sure.
I do have a friend, however, who already had a BA in English from Texas State, and he decided to go back to school at Purdue for a BS in Computer Science. He must do the ENTIRE undergraduate program. That's four whole more years of schooling for him.