How To Make A Grid Effect

* Grid Effect facilitates to frame grids as specified by the lists of X and Y locations i.e. the Horizontal and Vertical.
* Through this option, you can place the grid at the orientation and position as specified in Pixels for the image.
Steps to Follow
- Open GIMP.
- Launch a new image file.
- Click Image -> Guides.

- Select the portion of the image using any available selection tools.
- Now click New Guides from Selection from the Guides option. (View the below image)

- Then automatically the grids will be placed in all the directions - both "Horizontal and Vertical", because the whole image was picked earlier.

- Finally save the file by selecting "File->Save" button.