Gamesa said the G132's 64.5-metre blades are the longest to have been transported in Spain.
Once the G132 has been completed, validation will begin with a view to complete testing by the end of this year. The turbine is due to be grid connected by May.
A fourth blade for the turbine has also been made for static and fatigue testing at Spain's national renewable energy centre, Cener. Testing there is expected to be completed by September.
The blades will be fitted to the existing G128-5MW turbine at the site in northern Spain, which has been in operation for approximately 12 months.
An offshore version of the G132-5MW turbine was launched at RenewableUK's offshore conference in Glasgow last year. It has been designed for offshore deployment, and will be part of Gamesa's offshore joint venture with Areva, Adwen.
Windpower Monthly Blade Manufacturing and Composites Forum, 12 May 2015, London
Windpower Monthly Blade Inspection, Damage and Repair Forum, 28-30 September 2015, Copenhagen