The jacket structures, measuring 32-metres wide, were loaded out of the Lements yard in Vlissingen, Netherlands this week.
They will support the 600MW project's two high-voltage substations, which will be exported from the Port of Antwerp in a few weeks, according to a Gemini spokesperson.
Project EPC contractor Van Oord and Dutch firm Smulders Foundations manufactured the jackets.
The project is located 85-kilometres off the Dutch coast and is expected online in 2017.
The project will use Siemens' 4MW turbine with a 130-metre rotor, with monopile foundations. Earlier this month, Van Oord installed the first of the 150 monopiles from its Aeolus vessel.
The 600MW project is owned by Northland Power (60%), Siemens (20%), Van Oord (10%) and HVC (10%).
Windpower Monthly Future Offshore Foundations, 3-5 November 2015, Bremen, Germany