How much of a boost does being a URM give me?

I am a Mexican gay male and when I was growing up my family had low socio economic back ground but around high school we moved up to middle class. So far I have a 3.85 GPA, MCAT is 510, volunteered 80 hours in a hospital, was the leader of the food pantry at my school and had over 300 hours of volunteering there, I am an RA, had 3 part time jobs since freshmen year, 2 years of undergrad research with a poster presentation and 8 hours of shadowing.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: What Are My Chances? WAMC Medical Source Type: forums