Program: GS-2014A-SV-402

HD 135344B is a prime example of a transition disk with strong evidence for ongoing giant planet formation. Submillimeter images show a dust-depleted cavity with a radius of ~40 AU, while polarimetric differential imaging in the near-IR reveals two spiral arms extending from ~30 AU (inside the submillimeter cavity) to ~70 AU. Here we propose to use GPI to search for the putative planet(s) responsible for the observed inner cavity and to image the disk at an unprecedented resolution. HD 135344B presents an excelent opportunity to demonstrate GPI's capabilities to both detect forming planets and study the disks where they form.