At least under linux I can use GLSL 1.0 on my Atom N550 netbook (which has said GM3150). Performance is obviously questionable at best.
Wow! That's a miraculous achievement of GM3150.
Let's remember, GL2.0 requires GLSL 1.1 (or tu be more precise 1.10.xx).
GLSL 1.0 is a predecessor of GLSL exposed in the time of GL1.4 to announce arrival of new era. The interface to shaders is not the same as in GLSL 1.1 and other successors. That's what I meant when said ancient interface.