IGeLU works with its sister organization ELUNA (Ex Libris Users of North America) which represents over 1,300 academic, public, government and corporate libraries and library consortia in Canada, the Caribbean Islands, Central America, Mexico, and the United States. ELUNA promotes information sharing among Ex Libris product users on solutions, innovations, documentation, and resources.

IGeLU and ELUNA work together to support product enhancement cycles based on a formal agreement with Ex Libris. The two organizations also collaborate in representing the interests of Ex Libris products through working groups, with some working groups being jointly run (like the Alma WG) and some being IGeLU-only (like the IGeLU Primo WG).