I haven't found a way to have the console up when connected to GB.
Instead of connecting to GB, you could send fake messages manually in the console:
GB({"t":"musicinfo","artist":"Some Artist Name","album":"The Album Name","track":"The Track Title Goes Here","dur":241,"c":2,"n":2})
GB({"t":"musicstate","state":"play","position":0,"shuffle":1,"repeat":1})
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Instead of connecting to GB, you could send fake messages manually in the console: