What’s New > Windchill > 12.0.0.0 > Deployment and Configuration > Global Product Development Package I is No Longer Supported
  
Global Product Development Package I is No Longer Supported
Product: Windchill
Release: 12.0.0.0
Summary
The support for Global Product Development Package I (GPDP I) is discontinued from Windchill 12.0.0.0 release.