Gamesa will continue to monitor 108 G90 2MW turbines installed across the Castilla y León region of north-west Spain.
The turbines have been in operation since 2010.
Gamesa maintains 8.1GW of wind capacity in Spain, and a further 22.3GW in the rest of the world.
Manufacturers are making a increased effort in the O&M sector, aiming to increase the lifespan of their technology.
In December, Gamesa acquired a 50% stake in Spanish turbine data firm NEM Solutions to boost its O&M offering.
NEM Solutions offers a platform called Aura, which analyses data points on machinery going through maintenance, said Gamesa.
"[This creates] a model that defines normal operating conditions for each piece of equipment. Based on this benchmark, it predicts the future performance of each machine, diagnosing precisely and proactively, using artificial intelligence, potential equipment incidents," Gamesa explained.
NEM's systems will send data back to Gamesa's control centre in Sarriguren, Spain, to help predict when turbines will need maintenance.