http://www.carvalho-bernau.com/jlg/

This looks to be the real deal. I mean it looks old. However, it resembles Gotham in many ways, except, of course, the dot over the cap-I.

it resembles Gotham in many ways, except, of course, the dot over the cap-I
and the flat bottom vertex of M

Good point. Hmm.

You won't find a digital font with a cap I like that. As alternates, try Proxima Nova, Futura, Avant Garde.

You won’t find a digital font with a cap I like that.

unless it includes support for turkish, and then it should have a dotted I of some kind.