Further update
I ensured all updates were downloaded for CCS V5.5 and attempted a build. Got the following errors:
#10056 symbol "ResetISR" redefined: first defined in "./tm4c129xnczad_startup_ccs.obj"; redefined in "./startup_ccs.obj" grlib_demo
File devices/tm4c129xnczad.xml does not exist. Was included by file C:/Data/projects/CCS_V5_Workspace/grlib_demo/target_config.ccxml target_config.ccxml /grlib_demo line 0
#10010 errors encountered during linking; "grlib_demo.out" not built grlib_demo C/C++ Problem
#10056 symbol "g_pfnVectors" redefined: first defined in "./tm4c129xnczad_startup_ccs.obj"; redefined in "./startup_ccs.obj" grlib_demo
