The details of Gerard’s early life are obscure. Following the death of his father in 1640, Gerard was entrusted to the care of his maternal uncle, Mildmay Fane, 2nd earl of Westmorland.
Little more is known of Gerard’s activities both in and out of Parliament until the upper House was restored in 1660. Even then his recorded contribution to the proceedings of the Lords is meagre and complicated by confusion with Gerard of Brandon. In 1660 he was included on the analysis of the upper House by Philip Wharton, 4th Baron Wharton, as a Catholic.
Gerard took his seat in the House of Lords on 27 Apr. 1660 and began a lacklustre parliamentary career. He was present at just under half of the sittings in the first session of the Convention and his attendance thereafter was sporadic. In only one session, that of 1666-7, did he attend even a third of the total sittings, and he made no appearance at all at the sessions of 1661-2 and 1665. He was granted leave of absence on 11 June 1661; two days later he registered his proxy in favour of Gerard of Brandon.
By the time he had signed this dissent, Gerard’s health had begun to falter. On 1 Oct. 1666, and again on 29 Oct. 1667, he was granted leave of absence on grounds of ill health. Although he was able to attend two sittings each in November and early December 1667, the improvement in his health was short-lived. He died in London on 28 Dec. 1667, intestate. Administration of his estate was granted to his widow, who on three occasions during the 1670s (2 Dec. 1670, 4 Apr. 1677 and 14 Mar. 1678) petitioned the Lords claiming either privilege of peerage or privilege of Parliament for herself. On two of these occasions she appears to have been using privilege to protect men who were liable to arrest, one on a charge of felony. Gerard was buried on 25 Jan. 1668 in the family vault in Ashley, Staffordshire.
