G-Lasso Draw enables users to quickly generate 3D polygons directly in the viewport by drawing with Blender's Grease Pencil lasso tool. Because it utilizes the Grease Pencil system, users can take advantage of built-in features like stroke stabilization and primitive shape drawing to block out forms. The resulting meshes are constructed using modifiers, ensuring the geometry remains non-destructive and easily adjustable after creation.

The addon includes a gesture-based auxiliary tool for rapidly adjusting modifiers like solidify, skin, smooth, bevel, array, and voxel remesh. Additionally, it features a smart boolean system that allows users to perform union, difference, slice, intersect, and knife operations directly with Grease Pencil strokes.