I rember seeing the tinker-ish gnomes in basic/OD&D materials, but I wasn't sure if that was pre- or post-Dragonlance (now I know... {wait for it...} ...and knowing's half the battle!). It was interesting at first, but it became quite old quickly (well, for me, at least--YMMV).
To tell you the truth, I wonder if gnomes in D&D would have ever been created (or at least, taken form as they are now) if the original rules allowed for (some arcane, & divine) spellcasting dwarves (since gnomes seem to be somewhat more like the magical, mischievious dwarves of myth & folklore).
Personally, for my homebrew, I'm in the midst of redesigning gnomes. Originally, I was considering to make dwarves a sort of half-gnome/half-human race that evolved along their own lines. However, now I'm really considering making gnomes a race that resulted from crossbreeding between dwarves, halflings, & some fey folk--hence the gnomes' more magical nature, small build (though taller & stockier than a halfling), and racial abilities (though I was going to modify the age categories, possibly using svirneblin ranges instead). I'm just not sure if I should give them a "Dwarven Blood" or "Halfling Blood" race trait (ala Elven Blood or Orc Blood for half-elves and half-orcs, respectively), or even make them a bit like the feytouched (from Fiend Folio).