The multisystemic manifestations of cystic fibrosis (CF) involve all parts of the gastrointestinal (GI) system, including the pancreas, intestine and liver. As providers who care for people with CF (PwCF), knowledge of the manifestations, treatment and research related to nutrition and GI disease is important. This review is last installment of the CF Year in Review 2020 series, focusing on the multisystem effects of CF. Part one focused on the literature related to CFTR (cystic fibrosis transmembrane conductance regulator protein) modulators, while part two focused on pulmonary outcomes, radiographic and physiologic assessments, as well as infection and inflammation. Part three was split into Part 3A, focusing on the multisystem impact of CF, and this review, Part 3B, focusing on nutritional, gastrointestinal and hepatobiliary articles. Articles were chosen from Pediatric Pulmonology but also include articles published in 2020 from other journals that are of particular interest to clinicians.