At the age of eighteen he entered the house of La Rochefoucauld as a servant, and in 1646 became secretary to François de La Rochefoucauld, author of the Maximes.
Resourceful and quick-witted, he rendered services to his master during the Fronde, in his intrigues with the parliament, the court or the princes.
He bought depreciated rentes and had them raised to their nominal value by the treasury; he extorted gifts from the financiers for his protection, being Fouquet's confidant in many operations of which he shared the profits.
In three years he accumulated an enormous fortune, still further increased by his unfailing good fortune at cards, playing even with the king.
He was involved in the trial of Fouquet, and in April 1663 was condemned to death for peculation and embezzlement of public funds; but escaping, was executed in effigy.
He sent a valet one night to take the effigy down from the gallows in the court of the Palais de Justice, and then fled the country.
He remained five years abroad, being excepted in 1665 from the amnesty accorded by Louis XIV to the condemned financiers.
In this way he was able to reappear at court, to assist at the campaigns of the war with Holland, and to offer himself for all the delicate negotiations for his master or the king.
He received diplomatic missions in Germany, in Holland, and especially in Spain, though it was only in 1694, that he was freed from the condemnation pronounced against him by the chamber of justice.
In spite of several errors, introduced purposely, they give a clear idea of the life and morals of a financier of the age of Fouquet, and throw light on certain points of the diplomatic history.
They were first published in 1724.
Gourville died in Paris on June 14, 1703.