GMAC MARKETING, LLC. represents multiple Payroll/Human Resource Outsourcing Companies to find the PERFECT Customized Bundle of services for our clients! We believe that curating customized solutions designed to specifically meet our client's needs is the first step to creating WIN-WIN partnerships that are beneficial to employees and employers! GMAC wants to help you help your business grow while ...GMAC MARKETING, LLC. represents multiple Payroll/Human Resource Outsourcing Companies to find the PERFECT Customized Bundle of services for our clients! We believe that curating customized solutions designed to specifically meet our client's needs is the first step to creating WIN-WIN partnerships that are beneficial to employees and employers! GMAC wants to help you help your business grow while ensuring employee satisfaction!