Yeah, unfortunate scheduling. As I'm just returning from a month-long absence from BJJ due to various injuries, my wedding and honeymoon, I'm probably not competing any time soon and will be free to attend the seminar.
GB Culver City is run by Gerson Sanginetto (the short guy who does all the talking in the Gordo half-guard videos). I'm sure you've seen him and his team around. They're very active in the southern Cali BJJ tournament scene. In fact, Gerson is mentioned in Eddie Bravo's Twister video.