Detailed instructions for working a group puzzle of type 'Gabriel'

This is a signature puzzle named 'Gabriel'

The 7 elements in each group of this type of puzzle are: G, A, B, R, I, E, and L.

Every group in the puzzle must contain exactly this set of elements.

Each row is a group numbered as shown in this Gabriel figure.

In a Gabriel puzzle, each row is a group numbered as shown in the figure above.

Each column is a group numbered as shown in this Gabriel figure.

In a Gabriel puzzle, each column is a group numbered as shown in the figure above.

Each septomino is a group numbered as shown in this Gabriel figure.

In a Gabriel puzzle, each septomino is a group numbered as shown in the figure above.