ub3rmensch

Hey, I think this is a special circumstance. I am not sure how I will calculate my GPA when I apply to grad school. I graduated one year early (3 years total), and the first year I attended a separate 4-year institution. My GPA was good during that year, but when I transferred, my overall GPA dipped down to a 3. I also majored in a science, but will be applying for international relations or MPP/MBA. My question: can I manually combine the GPAs when I apply?