I might ask the question if I had big doubts. That said, if somebody walked the gauntlet of typical Google interviewing successfully, I'd be inclined to weight

I might ask the question if I had big doubts. That said, if somebody walked the gauntlet of typical Google interviewing successfully, I'd be inclined to weight the GPA as being not very important. More than anything I would think the GPA would be a filter at the beginning of the interview process, not the end of it.