[23] CitizenGO was founded in Madrid, Spain, in September 2013 by HazteOir,[1][18] (whose founder and president is also Ignacio Arsuaga),[15] to expand its scope of action beyond Spanish-speaking countries,[19] advancing the use of online petitions as a form of Internet activism to increase public participation in the democratic process.

The CitizenGO Foundation Board of Trustees is composed of Ignacio Arsuaga, Walter Hintz, Blanca Escobar, Luca Volontè (Unione dei Democratici Cristiani politician), Brian S. Brown (president of the anti-LGBT rights National Organization for Marriage),[25] Gualberto García, Alexey Komov (Russian Representative of the pro-Christian right World Congress of Families, considered a close ally of pro-Vladimir Putin oligarch Konstantin Malofeev),[26][27] Alejandro Bermudez, and John-Henry Westen.

CitizenGO has opposed the introduction of the "Estrela report" into the European Parliament, which recommends member states to provide comprehensive sex education in schools and ensure access to abortions, among other things.

[19] In late May 2019, CitizenGO hosted a petition by "Right to Life" calling on streaming service Netflix to stop funding a legal challenge to Georgia's controversial heartbeat abortion restriction bill.

[32] In 2013, CitizenGO signed a declaration in support of the Russian law which had the stated purpose of protecting children from being exposed to homosexuality,[33][34] but had the practical effect that hate crimes against LGBTQ people increased by two to three times soon after its introduction.

[35] In February 2019, CitizenGO organized a petition calling on DC Vertigo to cancel Mark Russell and Richard Pace's Second Coming comic series, which they regarded as blasphemous for its depiction of Jesus Christ.