 In 2007, Gilliam voted against legislation that would allow domestic partnerships for same-sex couples, and legislation that would prohibit discrimination against LGBT people in housing, employment, and access to public places.In 2013, he was one of five Republicans in the House of Representatives to vote in favor of allowing illegal immigrants to receive driver licenses.In 2014, Gilliam and Brian Clem participated in the Ice Bucket Challenge to raise donations for research into amyotrophic lateral sclerosis.