Rush as a sophomore?

I regret not rushing in the fall of my freshman year, but I'll be rushing in September. I am a Chi Omega legacy with 3 recommendations for my school's chapter, and my current college GPA is a 2.64. When I registered for rush, I included the activities of dance, involvement in my campus TV station, and a prior leadership role in the residence hall committees (I also have several volunteer experiences but I didn't list them...). After I registered, I read the Statement of Expectations for my university's Greek life, and it recommended that all Greek members and new member classes should have at least a 2.75 GPA (although some members I know in Greek life don't have that). In high school, I was very involved and my cumulative GPA was 3.5. But now that I'm rushing as a sophomore, is there a big chance that I won't get into the sorority I want because of my college GPA? And should I have mentioned my volunteer experiences when I registered?