The original Parkville location has not caught up with the cockeysville location on GF items. But the Cockeysville location is highly recommended. As others have pointed out, they have amazing GF crabcakes. Their regular crabcakes are some of the best around and the GF version is at least as good.
Unlike some places, the GF menu is extensive and includes pasta dishes, sides, desserts, and other entrees. Most of the staff I've dealt with are knowledgeable and helpful when it comes to the GF menu items.
I go here at least once per month.