The main objective of this study is to test a once-weekly HIV medication regimen in persons who have not taken HIV treatment before. The goal is to see if taking a once a week pill combination (GS-1720 and GS-4182) works as well as taking a daily pill Biktarvy® (B/F/TAF). Participants will either take the weekly pill or continue with Biktarvy® for about 48 weeks or longer. The study will look at how well each option controls HIV levels.