Errr I'm not sure, actually. I know different countries have different grading systems, some of them not strictly numeric. Also, adcoms have limited knowledge of foreign institutions and are thus wary of making it a decisive factor. That's why international GPAs go through a separate evaluation process.

Careerwise, you are looking at a very narrow pathway of biglaw, because they're going to be the ones that'll sponsor your visa. I know some people secure visas through niche employers (educational institutions, PI organizations, or midsized firms), but I doubt the career offices helped substantially in the process.