Guust

You can add a category drop down with the advanced search, but that will include all categories.
For example look at https://wpgeo.directory/docs/ where you have the category box, second in the search bar. See the hotel subcategories?

See also “Category selector” at https://wpgeodirectory.com/docs/gd-search/

The advanced search does not search custom fields, only titles, description and taxonomies (tags and categories) of the listings.
It allows the filtering of those results by choosing from the custom fields, but it does not search the content of the custom fields.
https://wpgeodirectory.com/docs/gd-search/#custom

Well done 🙂
And thanks for sharing!

Only admins can create categories.
Users can add tags, they can be anything.
Tags and categories are completely independent and separate of each other.
The GD Search does search tags: https://wpgeodirectory.com/docs/gd-search/#search

Subcategories can only have one parent category, but a category can have many subcategories.

Think about this as a library:
Categories could be fiction and non-fiction
Within fiction you would have crime, romance etc (subcategories)
You can “tag” any book with any label you like: “good read”, “gory”, “France” etc

You’re welcome 🙂

GD > Place Settings > Custom fields are special GD custom fields, and they are part of the listing submission by your users.
The other ones are WP custom fields, and your users have no access to them.

The home page is customized with widgets, so if you want 5 rows with different content, you add 5 different widgets above each other.
Use the GD Home Content section.
Have a look at https://wpgeodirectory.com/docs/layout/#directory

I don’t know which page you mean with “listing page”: the ListingS page (category pages) or the Detail page (one listing only)?

That does not mean it is not compatible, all it needs is a little styling, for example:

#geodir-wrapper {
    max-width: 1200px;
    margin: auto;
}