Can someone help me abt this

Yeah. You're on the right track. You just need to add it to your server. The GSLT can be set in one of two places depending on your preference:

1. With the Login_Token property in the server’s Config.json file, under the Browser section.

2. Using the GSLT command during startup. This can be specified in the Commands.dat file or on the command-line.

Here's a link to the guide mentioned in your server console: https://docs.smartlydressedgames.com/en/stable/servers/game-server-login-tokens.html#unturned-configuration

I'm not exactly sure why you'd be looking for a mod's Bundles folder, sorry. But most maps do not have custom Bundles packaged with them, which is probably why you don't see one here.

My assumption is that you're trying to install a Workshop mod on your server. If so: whatever the video is telling you isn't accurate. I recommend always referring to official documentation first: https://docs.smartlydressedgames.com/en/stable/servers/server-hosting.html#how-to-configure-server

If you're trying to install a mod on your server, open the WorkshopDownloadConfig.json file in a text editor. Add the mod's file ID to "File_IDs" array. You can find the file ID in the URL of the mod upload. For example, this is Hawaii's workshop page: https://steamcommunity.com/sharedfiles/filedetails/?id=1753134636. It's ID is 1753134636.

Your file would look like this:

"File_IDs":
[
        1753134636
],

Multiple mods would be separated by commas. For example:

"File_IDs":
[
        1753134636,
        1702240229
],

Any workshop file IDs included in this json file will be automatically downloaded to your server, and automatically kept updated. Any players joining your server will automatically download these same mods.