I'm a and my g/f wants to come to my job Christmas party!?

my co workers do not know my ual preference...our annual christmas is coming and my g/f wants to come...i just came out the closet tomy family...but..i'm afraid to inform my coworkers...the party is upscale and my g/f is a hard butch..should i take her?..i'm so afraid of what they will say and how they will treat me afterwards..!!!..