To use Lowrance Genesis Live datas you can use the freeware "GenesisLiveTool v0.72" (
drive.google.com/file/d/1x6a2zxyYk4wNoAZBQhNiRAn7HDKmg0c7/view ). The depth informations lay in the GenesisLive folder, not in the gsd-file. You also can create new GenesisLive folder from csv files. There is also a trick to create shorelines, which are not generated by the device (but rather depth areas overlapping the shore).