Sororities and grades

I plan to rush in the fall and hopeful of finding a house that feels I would be a great fit for them. I know a good number of girls from my hometown and high school that are in different sororities at UT and the girls are all really cool and seem to love their houses. It's important to me to keep my GPA high and I'm in an honors program and want to do well. Will that be difficult given the time commitment of greek life? Are some sororities more serious about their grades than others - or is it a mix in every house with some girls more focused on those things. Assuming I can get a bid, just want to make sure I know what I'm in for. Appreciate your thoughts.