You create custom filters via the July4ers -> Custom filters menu item in the far right menu.
In this case, something like this:
- Click New
- Click Add
- Under Favorite points, select "equal or greater than" and the number you want
- Click Add statements
- Click Add to filter
- Add a suitable name
- Click Save
Now you can go to more or less any page on Project-GC and apply this new filter in combination with other standard filters.