According to this article:
“GNI (Global Network Intelligence) and IW (Information Warfare) are two acronyms that have become part of NSA’s language over the past couple of years. Both convey new and comprehensive activities that are critical to NSA’s future and both dramatically affect the Agency’s offensive (SIGINT) and defensive (INFOSEC) missions. The purpose of this article is to provide a general overview of the background and ongoing activities in each area, to explain their interrelationships, and to discuss a few relevant challenges that are of general interest to the NSA workforce.”
This record was released previous in heavily redacted form. In February 2018, I requested a Mandatory Declassification Review (MDR) of this document, in hopes to get some of the redactions lifted. In August of 2018, the NSA removed a considerable amount of redactions, and released the document to The Black Vault.
You can find the newest version (as posted in August of 2018) of this record.