We have called it the GASP, the GSP, and also the Garvey Displacement Plan. The formal name is the Garvey Ave. Specific Plan.
The link on the City of Rosemead page was dead, so I got this from staff.
Additional Information
What is a Specific Plan – Planetizen
Cal. Code Regs. Tit. 14, § 15182 – Projects Pursuant to a Specific Plan – this is about fast-tracking projects that conform to a Specific Plan, and are either proximate to transit, or are residential projects.
A Planner’s Guide to Specific Plans – State of California
Map of Specific Plans in Unincorporated Areas of Los Angeles County
City of Los Angeles Community Plans – City of Los Angeles
City of Los Angeles Community Plans – LA Conservancy
SGV Forward – Regional Bus Project
SGV Forward – A project by the SGV Council of Governments. This is not part of the GASP, but it affects the GASP area and points east and west on Garvey. Stories: 1, 2
Wikpedia: Bus Rapid Transit
The bus along Garvey is the Metro 70 line.