Hij had een relatie met Elisabeth de Vermandois, Dame de Crepy, Countess of Leicester.
He was Seigneur de Gael and de Montfort. In 1119 he was granted Bréteuïl, his maternal uncle's estate, which had been held by his illegitimate cousin Eustace de Pacy. Ralph was beseiged at Bréteuïl by the king of France, who wanted to see the castle returned to Eustace, but the siege was broken by the arrival of Richard of England. Ralph de Gael, worried that the Norman people of Bréteuïl would not tolerate a Breton, came to an agreement whereby his daughter and heir would be married to Richard of England.
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