When you say graduate certificate, I assume you are referring to the shortest course of study whereby you develop career competency in a single subject. If my assumption is incorrect, my apologies.
I did a little research since I don't have very much experience with these. I linked an interesting article below that discusses how employers view online graduate certificates that I think might be helpful. At the end of the day, I think these certificates' relative merit boils down to whether you can articulate how it makes you a better candidate for a job. Just like anything else on your resume, if you can explain how a given experience, degree, or prior work experience was beneficial and differentiates you from other potential employees, then yes, it would be taken seriously by an employer.
I hope this helps - don't hesitate to reach back out. Good luck!
Jacob recommends the following next steps: