1) A GPA from a school outside the US is not a problem, that's the case for lots of PhD students.
Different programs may have different recommendations about how to proceed. Some programs ask you to inform your original GPA (the way your school grades), some ask you to convert that to the US system, some ask you for additional documentation that explains how the grading system works at your school.
2) I think your GRE score is going to be a problem.
Maybe not for all schools, of course, but I expect your score to be an issue for many of them. Especially for schools that really use the scores as a cut-off.
My usual recommendation would be to try the GMAT. Some people get better results with the GRE, some people get better results with the GMAT. So it's good to take both if you have problems getting high scores. But I guess there is no time enough to prepare for that, as application deadlines are close. So, I suppose you gotta try and see what happens.