A low GPA is a surmountable obstacle assuming you can demonstrate that the prior performance does not represent your true abilityand you are flexible with regard to the exact institution you attend. Further, a low GPA might not be as bad as it looks at first glance assuming that you had a postive grade trend and the worst classes were not of great concern to MBA programs.
On the other hand, the high school GPA you cited is probably not particularly relevant. However, if a 3.4 from your secondaryschool is at the top of the grade scale, it would suppport an argument that you were an extremely strong student who had some sort of difficulties that prevented you from performing at your usual (i.e. superlative) level.
I would also consider taking graduate level courses to conclusively prove that you are capable of attaining high grades in advanced coursework.
Thanks for the reply. I got certified as an SAP technical consultant doing self study. SAP certifications are really tough. Do you think that will help if I mention that on one of the essays? I'm not really planning on taking any graduate level courses before I start the program unless it is a condition of admission. I'm limited in the number of schools that I will apply to full time because I will only go if I can get a scholarship and I can only get a scholarship if I go to a limited number of schools. I got A's on all my math courses except for one Statistic course I took during my Junior year and got a C. I got As in Bs in all my classes except for those I took during my junior year.
I think I can get great recommendations from my managers because they do see my value and potential.