The schematic in the Starter Kit Manual seems to be the generic one for BT+GPS+FM. Can you please provide a recommended schematic for BT and GPS only and, if available, a recommended PCB layout?
You can use the generic schematic only removing the FM RX + TX RF section and choose your preferred UART mode. Please avoid using ferrite beads for power supply decoupling. The Starter Kit layout shows no significant influences about EMC