Bad GPA
Sometimes, lack of motivation is a cause for a mediocre GPA. In my case, I decided that I wanted to work in radio, but I continued with my Accounting major because I figured that it would benefit me in the long run. As it turns out, it did. But, I wasn't all that motivated in college. So, an answer I would have used to try to explain away a low GPA is (1) I had been working already for years and accomplished a few things and (2) aviation was something that I loved and motivated me. Proof was I scored over 90 on most of my writtens. Also, as you get older, you mature and see things differently. So, something like that would have been my answer.