Hi Melvin,
One approach it to control the widths, spacing, and font size specifically for mobile. This can be done through the responsive buttons at the top of the block settings of gb blocks.
Example: https://share.getcloudapp.com/v1uO86Gz
Another approach is to create a new Grid in addition to the grid you already have.
Then, set the hide-on-*
settings.
Specifically, one grid is hidden from table and desktop, and the other for mobile.
Then set the design of the other grid to your preference.
Lastly, one other approach is to use a WP Table block as an alternative.
Hope this helps!