Getting a gift for a guy is either super easy or it’s the mots difficult thing in the world. Atleast that’s what I’ve found. My dad and brother are quite easy to get gifts for, but my boyfriend on the other hand. It really depends on wether they have a big interest in one thing.

You can always go for the classic socks/underwear or a lovely jumper. Or you can be a bit more creative and get them something different.
If they are a bit more tech-savvy why not get them some cool gadget. Or get something for their inner-nerd.