How to increase gridmap item mesh size

Godot Version

4.2.1

Question

Is there a way to increase gridmap cell mesh size so that gridmap cell size and item mesh size go hand in hand

What do you mean? You can change the GridMap.cell_size property to change the cell size and GridMap.cell_scale to scale the items inside the cells.

The problem is if i increase the cell size there will be gap between cell items. For default my cell item size is small compared to cell so i scaled the item up now its residing in more than one cell.The problem arises when i try raycast3D to collide with it to find the cell coordinate i get the wrong one because its overlapping other cells