My gnomes in my Skylight House seem to love being on the Case Closed Coffee Tables. I am almost certain I got those coffee tables when my sculptor Sim made them by sculpting. I now check those coffee tables regularly to see which gnomes have claimed them for the moment. They seem to rotate fairly quickly.
Here are a few pictures of the gnomes I've come across there so far.
http://s5.postimg.cc/5pke2y8zr/Gnomes_Bob_And_Mysterious_Baby1.jpg
http://s5.postimg.cc/dtsi7ovev/Gnomes_Bob_And_Mysterious_Baby2.jpg
http://s5.postimg.cc/3v2ho3fnr/Gnome_Mysterious_Old.jpg
http://s5.postimg.cc/ot8nm6fif/Gnome_Manchu.jpg
http://s5.postimg.cc/t7m6v4wef/Gnome_Vampire.jpg
And I found this pair in the garden. I wondered if they are doing Tai Chi?
http://s5.postimg.cc/9n7nscvt3/Gnomes_Evil_And_Mysterious_Ti_C1.jpg
http://s5.postimg.cc/fcnwco1zb/Gnomes_Evil_And_Mysterious_Ti_Ch.jpg
And I found a gathering of a few of the gnomes in a few different places. Since I have this house in Lucky Palms at the moment the grass is missing.
(I used fake grass in the inside gardens to avoid the unfinished room moodlet - that's why the previous picture shows gnomes in the garden with grass.)
http://s5.postimg.cc/y8tkwi3uv/Gnomes_Skylight_House.jpg
http://s5.postimg.cc/udq6txkp3/Gnomes_Skylight_House1.jpg
http://s5.postimg.cc/atbnr5k3r/Gnomes_WIth_Werewolf_Skylight_H.jpg
I have two of the Lounge Lizard gnomes. I like them as they give my Sims a +20 moodlet all the time.