template gridbox in com_content joomla

hello I have created a site using Gridbox, everything is going great, but I have native Joomla categories and articles that I don't want to import into Gridbox. I need the Gridbox template to be applied to all my pages. For example, it's a news site, so I need many articles. Therefore, I have a sidebar on the right and a graphical header on the homepage that I need to remain consistent across the entire site. The articles are displayed through Joomla modules, and when I enter an article, only the header and footer remain. Please help.

The website is destroll.com.

Replies are visible only to logged in members with an active subscription.