Agnew has 56 MegaWatt of installed capacity, which is enough to power 11,500 homes over 12 months.
Modular equipment was chosen for the high-altitude site.
The filters are to improve the physical and chemical stability of the tailings.
The three-year gas supply deal will start July 1.
Five modular thickeners and one clarifier will also be sent to the high-altitude mine.
Gold Fields' operation in Western Australia now has microgrid installed.
Gold Road and Gold Fields mark Gruyere opening
A 23MW hybrid renewable power station has been officially opened at Gold Fields' Agnew mine
Commercial production has been declared at the Gruyere gold mine in Western Australia
The commissioning of the final components of the process plant is now complete at Gruyere
Gold Fields and Gold Road Resources' A$621 million Gruyere gold mine pours first gold
Gold major says financing, technology aiding transition to renewables