Adding a Custom HTML Sheet to Gantry5 on Wordpress

[Wintau00]

Hello,

there is a detailed guide on Gantry Docs on how to set up a custom CSS Sheet, but I couldn't find any information on how to do the same for a custom HTML sheet. Would this be possible?

I have been trying to use the Custom HTML Particle, but fell into a few. For instance, I couldn't manage to get the Tag to work.

I'd be really grateful for any help.
regards