what can I make with left over garlic bread

CROUTONS!!!

I like a savory French toast with some gruyere and ham.

You can crush the bread into crumbs and have Italian-style bread crumbs for frying or baking.

I'm with Pegeen - reheat (maybe grate a little cheese on top first) and enjoy. This is the kind of thing that's very forgiving! Or, tear it up and use it to thicken an Italian-ish vegetable soup. Garlic, bread, hard to go wrong.

Aside from all the great suggestions already mentioned here...
Reheat bread gently, wrapped in foil in the oven, 225 F for about 10 minutes. Then dunk in soup while watching your favorite series on TV. :-)

Maybe let them "stale" and make canederli (Italian bread dumplings/gnocchi)? Or pappa al pomodoro (tomato and bread soup)..?

Or just make grilled cheese or panini.

Dry it out, then grate it for fresh breadcrumbs!

savory bread pudding,http://www.huffingtonpost.com/2013/11/05/savory-bread-pudding_n_4214598.html

Panzenella salad.

You could make croutons - or freeze it for later.