Need to re-up your Xbox Live Gold subscription? Or just looking for a good deal to extend your membership further? Here's an offer you may want to consider.Retailer GameStop is currently offering 12-month Xbox Live Gold subscriptions for $40, a pretty nice markdown from the normal $60 price. That's for a digital version, meaning GameStop will email you a code you can redeem on your console or through Xbox.com.Alternatively, GameStop is selling 3-month Xbox Live Gold download codes for $20, saving you $5 off the regular $25 price.