Should I include my GPA (overall) on internship application if it is optional?

I am applying for a summer internship and the application asks for my overall GPA. The qualifications listed for the internship did not include any minimum GPA requirements, and the GPA field is not one of the "required fields" on the application, so I am able to submit the application without putting my GPA. I currently have a 3.02 GPA, and am wondering if it is better to put my GPA so it does not look like I am hiding my GPA from the company, or if it would be best to not include it since it is not really something to brag about.

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