There is no correct answer to this question. Whether a GRE score is good or not varies from one individual to the other.
As a general rule of thumb, any score above 320 can be considered as excellent, and such a score should open a lot of doors for you when it comes to university admissions.
For more details and statistics on what a good GRE score is, you can read our detailed post here: crunchprep.com/good-gre-score