Think I've figured it out:
InfoList::make()
->columns(4)
->schema([
Grid::make(1)
->columnspan(1)
->schema([
Section::make('Section 1')
->columns(1),
Section::make('Section 2')
->columns(1),
Section::make('Section 3')
->columns(1),
]),
Grid::make(1)
->columnspan(1)
->schema([
Section::make('Section 4')
->columns(1),
]),
Grid::make(1)
->columnspan(1)
->schema([
Section::make('Section 5')
->columns(1),
Section::make('Section 6')
->columns(1),
]),
Grid::make(1)
->columnspan(1)
->schema([
Section::make('Section 7')
->columns(1),
Section::make('Section 8')
->columns(1),
]),
])