Yes. Assuming no buildings or clouds are in the way it's visible form pretty much anywhere on the right bank. The entire massif is. A quick google search landed me this photo which was taken from the lakeside in downtown Geneva. You'll notice that there's a break in the first wave of ranges. On the right there's the Saleve (long ridge rising up), on the left the Mole (classic pyramidal shape) and in the gap between them the full massif. Either it wasn't one of those perfectly clear autumn days when the whole massif is a bright crystal clear monument with a shimmering reflection in the lake, or the photo is imperfect, but you get the idea.

The Mont Blanc is visible from many heights around Grenoble when the sky is clear enough; much, much farther away...

Un roi sans divertissement est un homme plein de misères