Hi,
I like very much the theme, I bought the all in one plugin with all add-ons.
I have a child theme of Generatepress just blank without any change or added css, and I tested on firefox with firebug and I can see there how in some cases the css is overwritten.
Example, I change a color of something or spacing (padding) between boxes, the css code ‘inline’ appear strikethrough and take the original code on generatepress/style.css, then the changes are not reflected.
For now I add style to child style.css but would be great if I can use the customize without touch the code.
regards