In most cases, your transcript will speak for itself and “Tell me about your GPA” is a nice way of saying, “Your GPA isn’t that great. What’s the deal?” OR “Nice work in college, pal. Take a moment to brag on yourself.”
If your grades were good, it’s a good idea to put a transcript in your bragbook so you can show the interviewer your GPA along with the classes you took that relate to the position. If you’re grades left something to be desired, explain the other factors that led to a lower GPA (without being defensive) and quickly transition to more recent work experience and performance.
Ultimately you want to convey that you are a quick study, especially in technical subjects, a capable problem solver, and a solid communicator.
If you find this site helpful, please send a link to your career services department so your fellow alumni know about PharmBoard too! I've already written the message for you. :)