Searches for Custom GL Lines
You can use the Custom GL filter on searches to search for transactions that do or do not have custom lines created by a Custom GL Lines plug-in implementation. You can use this filter on searches of type Transaction. You can also use this filter on searches of type Multi-Book Accounting Transaction, if you have the Multi-Book Accounting feature enabled.
The following screenshot shows the configuration of the Custom GL filter on a search:

For more information about using search in NetSuite, see Simple and Advanced Searches.