Well... since most jobs ask for a gpa, you might as well put it on. Depending on what job you're applying for a 3.0 might look good or bad... just depends. So jobs don't even care even though they ask.
Good luck job hunting 🙂
dont put a 3.0 gpa on your CV. it will look bad. even if the job requires it, you can always give it to them later. you dont want to give someone who would have potentially hired you a reason NOT to hire you. good luck! 🙂