Hey mate.
First, thanks for your service.
Second, you're sort of in an odd spot in Groton (a lot of us feel the same way living in Connecticut)
A quick check of the store finder on
GW's website reveals a couple of stores in the neighborhood that should at least carry something:
http://www.games-workshop.com/en-US//store/storefinder.jsp
However, like a lot of us tabletop gamers in
CT, you may find your best community is 45 minutes to an hour away. For example, I live in Norwalk, but I play Warmahordes with the great folks at Gamer's Gambit, in Danbury,
CT, and I occasionally drive up to Flagship Comics and Games in Southington,
CT to play with a couple of friends of mine.
Speaking to
40k specifically, I know The Battle Standard in Manchester,
CT has some players. I also know that
GW recently opened one of their hobby centers in West Hartford,.
Anyway, if you have reliable transportation, I know there's a few community's within an hours drive that would love to have another player.
If transportation is more of a problem, then Lee's Toy and Hobby and the Toy Vault are closer by. Maybe one of them has an amazing community, but I have no idea.
Good luck, and let us know how its going for you.