Would you let your girlfriend go vacation with her male gay friend?

My girlfriend is going on a vacation with her gay guy friend they just met. Now she’s planning on going to Miami with him for a concert. She didn’t even ask me how I felt before planning this trip she just randomly told me. And after I told her how I felt and I didn’t want her to go with another dude on a vacation she just said he’s gay there's nothing wrong with it and that if it was the other way around she wouldn’t care. Personally knowing her I know dam well she would be pissed and annoyed. She just keeps saying he’s gay and that they won’t be sleeping next to each other in the Airbnb during there stay ( I call b. s) what are your opinions? Should i stay with someone who disregards that fact I feel uncomfortable and asked her not to go? What would you do in my position?
Would you let your girlfriend go vacation with her male gay friend?
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