How can I get a print out of an old ACMT certification?

Hope everyone had a happy holiday season. I wanted to inquire about getting a hold of old ACMT certifications that I had years ago when I worked at a previous workplace that required the certification. The retail shop is no longer in business, but I do recall that I had to log into GSX or some website to certify. I recently tried to log into the GSX website but it says I do not have access. Does anyone have any idea how to get in or get a reprint?

Thanks,

Eric