This is pretty cool: the university is hosting their third annual season t-shirt design contest, and you can enter. Designs are due March 11, and the winner will get a $500 gift card -- not too shabby.
Here's more info from the entry form site.
Last year's shirt was pretty cool.
2016 Season T-shirt Contest(I should also note I sell t-shirts of great previous GW lineups -- 1992-93, 1997-98 and 2005-06, plus a new one, the 05-06 backups.)
And a view of last year and 2014's shirt to get you in the t-shirt design spirit: