Using the Post Grid Combo plugin, you can query posts by post or page IDs. This article will show you how to query posts by their IDs.
Click on the “Query Post” tab.
From post types, select posts and pages by clicking and holding the Ctrl button.
Now, by clicking the Choose button, you can search for “Post In.” Now click on it.
Then click on the Post In drop-down menu and enter Post IDs or Page IDs (comma separated).
Now your Post Grid will be updated by those posts and pages.