An Open-label, Single-arm Study to Provide Continued Access to Study Drug to Participants Who Have Completed Pediatric Clinical Studies Involving Gilead HIV Treatments

The goal of this clinical study is to provide continued access to the study drug(s) to children and adolescents with human immunodeficiency virus type 1 (HIV-1) who completed their participation in an applicable parent study and to monitor for adverse events. The primary objectives of this study are as follows: * To provide continued access to the study drug received in the parent protocol or switch to bictegravir/emtricitabine/tenofovir (B/F/TAF) for participants who completed a Gilead parent study evaluating drugs for HIV treatment. * To evaluate the safety of the study drug(s) in participants with HIV-1.