I cant see why not! You deserve to be able to show off what you believe in, and you shouldnt let worry get in the way ^_^
I'd say it depends where you live and the general feeling about homosexuality around your area or wherever you're going. As Cherryx said you should be able to but sadly this is not yet the case everywhere...
I agree with FrenchKid98. I would hope that it is, but it depends on your community and how the general feeling is towards the LGBTQ community.