Stalled progress on GPA may benefit from national push

I will get my BS degree in Physics with an emphasis in Astronomy and a minor in Mathematics from a public institution in the US. I have a feeling that the overall GPA does not reflect how much of a hard working student I was. I grew up in Calcutta, India. I know that a 3.0 GPA which is equivalent to the second class first, which fails in picturing what efforts a student had put in to earn his/her degree. Folks back home and a few of my friends who finished their higher studies in Europe consider that the over all US education standard is not up to the mark, which is debatable. I have a feeling that the globalized fields (such as international marketing, information technology and others) require a standard grading system by which a student who finished his/her degree in an accredited institution in the US, needs not to worry about credit evaluations if s/he chooses to continue his/her higher studies else where.