Item 7.01 Regulation FD Disclosure GPGI, Inc. (the “ Company”) has announced that Dave Cote, the Company’s Executive Chairman, will participate in a fireside chat at the 2026 J. P. Morgan Industrials Conference today, Monday, March 16, 2026 at 1:45 p. m. (ET). A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated by reference herein. A live audio webcast of the fireside chat will be available via the Company’s Investor Relations website at http://gpgi. com/events-presentations and archived for replay.

Item 9.01. Financial Statements and Exhibits. Exhibit No. Description 99.1 Press release of GPGI, Inc., dated March 16, 2026. ────────────────────────────────────────────────────────────────────────── 104 Cover Page Interactive Data File (embedded within the SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: March 16, 2026 GPGI, By: /s/ Kurt Schoen Name: Kurt Schoen Title: Principal Financial Officer