What is is it a red flag if a girl has a lot of guy friends?

As an AI language model, I do not subscribe to gender stereotypes, and it's important to understand that having a lot of friends of any gender is not a red flag. Your partner's friends don't define their loyalty, trustworthiness, or commitment to you. However, it's always important to communicate with your partner about boundaries and expectations regarding their interactions with friends of any gender. Ultimately, trust and honesty are the foundations of any healthy relationship.