Here's the stats for the school I am applying to:
Last year: 1675 applicants, over 1100 WELL qualified, 140 4.0 GPA's, only 130 spots in the program.
This school also factors in entrance exams and interviews, but if they were solely GPA, even the 4.0's would be in trouble!!!!
I think over a 3.5 is the across the board standard, but in this day and age, it seems you need to be as close to perfect as humanly possible! But check around you area. You state should have a board of nursing website with all the schools in your area. I would meet with the advisors of the schools you are interested in to get the best answer.