Gnome Ceramophs are a thing.
Which results in those things.
![[Linked Image]](https://static.wikia.nocookie.net/forgottenrealms/images/3/36/Gnome_squidling-5e.jpg)
Yes sometimes there were also "proper" gnome mind flayers. Except that they remained short and, worse for mind flayers, retained there personality and were generally peaceful.
So both results are undesireable from a mind flayers point of view which means gnomes wouldn't be abducted in the first place.