Grid List

import com.atlassian.crowd.embedded.api.User
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.security.JiraAuthenticationContext
import com.atlassian.plugin.PluginAccessor
import com.atlassian.jira.user.ApplicationUser
  
// get current user
JiraAuthenticationContext jiraAuthenticationContext = ComponentAccessor.getOSGiComponentInstanceOfType(JiraAuthenticationContext.class);
Object userObject = jiraAuthenticationContext.getLoggedInUser();
User user = userObject instanceof ApplicationUser ? ((ApplicationUser) userObject).getDirectoryUser() : (User) userObject;
  
// find TGE custom fields
PluginAccessor pluginAccessor = ComponentAccessor.getPluginAccessor();
Class tgeConfigManagerClass = pluginAccessor.getClassLoader().findClass("com.idalko.jira.plugins.igrid.api.config.grid.TGEGridConfigManager");
def tgeConfigManager = ComponentAccessor.getOSGiComponentInstanceOfType(tgeConfigManagerClass);
List tgeCustomFields = tgeConfigManager.getGridList(user);
  
StringBuilder result = new StringBuilder();
result.append(tgeCustomFields.size() + " TGE fields found:\n");
for (def tgeField : tgeCustomFields) {
    result.append(String.format("-[%d:%s]\n", tgeField.getId(), tgeField.getName()));
}
  
println(result.toString());
return result.toString();