So i decided to loosely adapt Dungeon Module L1: The secret of Bone Hill. That's basically what i have been doing these last couple days. Changing peoples Species. Adding some Meenlocks and Norkers. And reading Renovating the Temple and other things about adapting AD&D to GURPS. It's going alright so far i guess. I don't really have such to add here so...Meenlocks!
Monster Manual 2 (3e) Meenlock I don't know the artist.
Fiend Folio 1e Meenlock by Russ Nicholson (Thanks Peter D).