[Plugin: Shortcodes Ultimate] Custom Columns – PADDING????

This is where I am stumped
https://bcbdigital.com/

Here’s the code for the above columns

[gn_column size="1-3" last="0" style="1"]
[/gn_column]
[gn_column size="1-3" last="0" style="1"]
[/gn_column]
[gn_column size="1-3" last="1" style="1"]
[/gn_column]

I am tring to add additional padding to the left on the left column and a lil on the right of the right column Ho

How would you guys recomend me tackeling this?

BTW: I love this plugin, its really saving my @$$.

https://www.ads-software.com/extend/plugins/shortcodes-ultimate/