I know Gepids aren't Goths (both E. Germanic), but Davidski modeled a Gepid Serb as: 35.2% Balkans_IA", 28.2% Nordic-IA (from Sweden), 26.4 Scythian, 6% Han, 3.8% Nganasan. http://eurogenes.blogspot.com/2018/03/first-real-foray-into-migration-period.html …
A beautiful result that perfectly conforms to know. history, showing a Swedish origin for East Germanics, followed by a long trek through the remnants of Scythia before settling in Eastern Europe and being overwhelmed by Huns.