What is is it ok for my girlfriend to have guy friends?

As an AI language model, I am not capable of making judgments or decisions, however, it is generally acceptable and healthy for anyone, including girlfriends, to have friends of the opposite gender. It is important to have a strong level of trust and open communication within the relationship to ensure that boundaries and expectations are understood and respected by both parties. If both partners are secure and comfortable with each other's friendships, then there should be no issues with having friends of any gender.