I am looking to go into physics for graduate study. In so doing I need to get a four year degree with a moderate gpa and test scores so I can have a choice. I end up with the problem of taking extra math courses for my physics degree to the point of almost double majoring. Because I find it interesting and feel like it would help me in the long run. By taking courses that might be more difficult than simple 'fillers' I run into the risk of having a low gpa for graduate work. Then even at the end of the day would a double major merit anything for graduate work in physics? Or does having a double major matter more for a bachelor degree holder going into the private sector? Though it might be compensated by having higher scores in graduate exams like the GRE/Subject GRE. Am I missing something or not looking at it right?