No. French Guiana doesn't ask visitors to fill in an online arrival form (also called an entry form, immigration card or landing card) before they travel. French overseas region outside the Schengen area; some nationalities need a visa.
Do I still need a visa for French Guiana?
An arrival form is not a visa. Whether you need a visa or an electronic travel authorization depends on your nationality, so check French Guiana's official immigration website or your own government's travel advice.