Hi,
Here are two links for BIM files for gates and railings, on the right hand side is an option for downloads, please select the file format you would like to download, and the download will begin automatically.
https://www.modlar.com/search/products/?q=gates&formats=Other%203D--Vectorworks
https://www.modlar.com/search/products/?q=railing&formats=Other%203D--Vectorworks
Thanks, Lucille