[SWTXBelle]

I have a sister who I highly suspect is gay. But it really never was an issue - hey, your sex life is your business, not mine. She is a whole person, not her sexual orientation. Were she to tell me she is gay, it really wouldn't make any difference to how I feel about her. The vows we took bind us as sisters - she is my sister, no matter who she loves romantically.
Back to the original question - Gamma Phi Beta has never had discriminatory membership clauses. I don't see any need to add to what has worked for us for 130+ years. Every chapter is free to select members as long as they meet our membership standards - none of which concern sexuality.