GlideSystem The GlideSystem API provides methods for retrieving information. The GlideSystem (referred to by the variable name 'gs' in business rules) provides a number of convenient methods to get information about the system, the current logged in user, etc. For example, the method addInfoMessage() permits communication with the user. gs.addInfoMessage('Email address added for notification'); Many of the GlideSystem methods facilitate the easy inclusion of dates in query ranges and are most often used in filters and reporting. For additional information, see GlideSystem on the ServiceNow Developers site See the ServiceNow Developers site for API information.