The autocomplete functionality in the editor does not seem to pick up C++ standard library content when using the GCC compiler. While adding the full path to the C++ standard library header files in the include search paths allow autocomplete of the C++ header file names when adding it to the source file via #include (and you can F3 to open the file itself in the editor), the autocomplete for things like std::string does not work. The syntax highlighting also does not work as expected.

Everything seems to work fine when using the TI compiler, hence it seems specific to GCC. This does not appear to be an issue with other Eclipse/CDT based IDEs (i.e. MCUX), hence it seems that this may be some CCS configuration issue when using the GCC compiler.