I recommend you go
here and download the AAdvantage Gold Membership Guide, to familiarize yourself with your privileges and benefits levels as of March 1.
As for the upgrades, some have reported requesting, and being granted, upgrades more or less commensurate with the approximate miles left to a 10k node (e.g. if you have 36,000 miles on the "Miles Towards Gold / Platinum / Executive Platinum Upgrades" counter, you could request two upgrades,) which may or not be allowed; this is strictly up to the agent, and is not a published benefit or privilege.