Is not having a GPA going to keep me from a good grad school?

[cookderosa]

Thank you both for the feedback. My dream is to attend the MBA program at the University of Michigan's Ross School of Business. The admission requirements do not specifically address GPA. It only says.

"You must have the equivalent of a US bachelor's degree from an accredited institution by the time of application. You may submit an unofficial copy of your transcripts (and degree documents if applicable) with your application. If accepted, official transcripts will be required."

"The Admissions Committee seeks to bring together talented students from a broad range of academic and professional backgrounds. Applications are reviewed holistically; no single factor – e.g., GPA, GMAT/ GRE score, or years of work experience — determines the outcome. Applications are reviewed with three broad criteria in mind."

I like the idea of taking some regular classes to make sure I have at least some sort of GPA.

I like your plan, and if I may....
for some reason, we skip over writing and research here on this forum- not writing like I'm doing right now in this thread, or research like using Google- but academic research writing. Using style from your field (APA, MLA, Chicago, etc.) Academic writing is required in grad school, and "most" students learn it in English 102, then practice it in the classes they take. Furthermore, many students do a lot of research and writing in their field when they take the courses in their major. When you test out of *everything* you miss an opportunity to develop your academic writing and academic research muscles.
I took classes in my major when I attended TESU, and even though I didn't do a ton of academic writing in my classes, it helped a bit. My hubby is in an MBA program now and while he has writing assignments, they aren't as strict regarding academic style/research, so I'm not sure if that's just true of his program or if it's true of MBA programs in general.