Ian Grieve explains how to record a macro in GP at:
Microsoft Dynamics GP Macros: Recording A Macro | azurecurve azurecurve
Microsoft Dynamics GP Macros: Recording A Macro | azurecurve azurecurve
Development & IntegrationMicrosoft & the GP Ecosystem
Archived post from 2017. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.