Because adobe indesign layout pages can include column guides as well as margin guides you can establish the gutter dimensions for a variety of layout options within one set of guides.
Indesign margins and gutter.
Or you can update or add a gutter to an existing project by selecting layout margins and columns from the top menu bar.
To achieve uniform spacing set your gutters to the same value as or a multiple of 1 5 or 2 for example the leading of the text.
You can set the gutter size from the new document menu when creating a new indesign project.
Open the pages panel window pages and select the thumbnails for the pages you wish to change.
Gutter widths should relate to the body text leading value.
Indesign uses the first definition in margins and columns so i m going to guess that is what your question is about.
Choose layout margins and columns.
Enter values for top bottom left and right margins as well as the number of columns and the gutter the space between columns.
Assuming i guessed correctly are you trying to define the gutter widthor gutter position.
Some people use gutter to describe the space between 2 columns other use it to describe the space between two pages.