File a complaint with a higher-up. Call the company directly. That is highly illegal and sexist, not to mention the fact that girls usually sell more video games (sadly.)

It's true

Since I'm generally optimistic about humanity, my guess is that your DM only said that to shut the customer up. If he really meant it, he would have gotten you fired long ago, because it's not like you've been concealing your gender.

Sue them for discrimination. You'll probably make enough money to not even need a job... at least for a while

Gammer chicks are hot.

That is sexist.

Oh than a girl playing violent video games would throw him off as well... What a jerk

Sexism never seems to go away. If you do get fired you can sue them.

That's so gay because everyone knows gamer dudes get total hard ons when they walk in to see a gamer chick behind the counter!!!!!! It's like their fantasy come true xD

Yeah sometimes it sucks being a girl gamer. If Im ever on halo and I speak, everyone freaks out that a girls playing and tells me to get off and it's too violent for me.:/ but one good thing about is is that my boyfriend loves it about me. :3