My girlfriend wants to throw out my grandmother?

Ok so my grandmother has been at out house for like 3 hours and my girlfriend already hates her. My grandma is going to stay with us for 2- 3 days. She says she doesn't like her because she's too cultural and traditional. My gf alo doesn't like her because my grandma is a clean freak and expects our house to be spotless.She wants me to kick her out. What should I do?