Some jobs will readily accept a GED/Cornerstone diploma: Many entry-level positions in retail, fast food, manufacturing, and some service industries will accept a GED.
Other jobs may prefer or require a traditional high school diploma: Some employers might prefer a traditional diploma, though this is becoming less common. Certain fields, especially those requiring further education or advanced training, may strongly prefer or outright require a traditional high school diploma as a prerequisite for applications.
In short: You *can* get a job with a Cornerstone high school diploma (GED), but the range of opportunities might be slightly narrower than with a traditional high school diploma. Your skills, experience, and the specific job requirements will ultimately determine your success in finding employment.