Apple has released its GM, or Gold Master, version of the iPhone SDK 3.2 for iPad. According to an email sent out to registered iPhone developers, all iPad apps submitted going forward must be built and tested using this release. The email reads, “[a]ll members of the iPhone Developer Program can submit their iPad apps to iTunes Connect for review and approval. If you did not submit your app during the initial review period, but upload it by March 31, it will be reviewed but may not make the grand opening of the iPad App Store.” Apple’s “initial review period” began on March 19 and ended March 27; applications submitted during that timeframe are eligible for the grand opening, but must be re-submitted using this latest SDK release for final approval. The iPhone OS SDK 3.2 GM for iPad is available now to registered iPhone developers through the iPhone Dev Center.