Technically. But he didn’t work on it? Drive it? Live in it? Put time and money into it? You can acknowledge this gray area without thinking he’s innocent or didn’t do anything wrong.
Now that Gabby is dead, the van goes to next of kin unless she has a will or other stipulation that states otherwise.
But before she was so declared, it was nebulous. Family did not demand van back— they may not even have known it was legally hers. They lived together and shared stuff so it was not easy to know what was whose. BL drove it most all of the time. She was not comfortable with it. A lot of reasons why it might be in her name rather than theirs