See footnote no. 14 and the highlighted box on the final page of this document...:

https://cdn.gihub.org/umbraco/media/2730/chapter-4.pdf

Hi Katie, unfortunately this exact phrase doesn't appear in any of my legal dicitionaries so I can't point to a clear source, but given that 'marché' can be simply translated as a 'contract,' I would opt for 'global performance contract.' I've found a site where 'MGP' is translated in this way, and also the use of this exact phrase on a UK government website, so that would be my choice. Both links below, I hope this helps.

Since 3 colleagues have already submitted identical proposals, I may venture to do the same, but with different references.

Built by the Legendre Group, this mixed-use project of 11,000 m² houses the Habitat 76 headquarters called “Spatium” and two buildings with a total of 67 housings. Built under a "Global Performance Contract" (GPC) , the building dedicated to the Habitat 76 teams has obtained the Passivhaus label (a European certification).
:
Legendre Energy will be responsible for the maintenance and operation of the building for 10 years. To optimise its consumption, the teams will rely on the data provided by MaXim (Maintenance eXploitation bIM), a monitoring tool developed entirely by the Legendre Group’s engineering teams. This new technology allows to centralise consumption data to facilitate the management of buildings and optimise their use.
https://www.legendre-energie.com/en/news/legendre-energie-re...

What about DBO contracts (or maybe O-DB) in the water treatment infrastructure French market ?
:
In 2014 a European Directive promoting lifecycle durability & plant performance, specifically for energy efficiency, triggered changes. Then came the "Global Performance Contract" (hereafter GPC), a Design-Build-Operate (DBO) procurement contract where operation revenues are based on measurable performance commitments (energy efficiency, environmental impacts…).
:
GPC suddenly became a good alternative for communities open to contract with private plant operators but not willing to borrow money from big corporations for building their water treatment infrastructures. Besides, GPC would allow public authorities to shorten operator’s contract duration (no more linked to CAPEX amortization) and to better control their water tariffs. While DSP can last up to 30 years, GPCs in water treatment infrastructures tend to be based on 6 to 10 years, including construction period (2 to 3 years).
https://www.linkedin.com/pulse/what-dbo-contracts-maybe-odb-...

For the context:

**The Global Performance Contract (GPC) ** replaces the Design, Build, Operate and Maintain (DBOM) and Build, Operate and Maintain (BOM) contracts previously provided for by the Public Procurement Code.