- As his mother was not of royal descent, his father signed a renunciation to the Spanish throne prior to their marriage. Thus, Gonzalo and his brother were not in the line of succession to the Spanish throne in accordance with the Pragmatic Sanction of 1776.
- Cousin of Juan Carlos de Borbón, and Pilar de Borbón.
- Former fiancé of Marcia Bell.
- Grandson of Queen Victoria Eugenia and King Alfonso XIII. Great-grandson of 'Princess Henry of Battenburg'. Great-great-grandson of Queen Victoria and Prince Albert.
- Half-brother of Leandro Alfonso de Borbón.
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