it looks like gotham is still used on the inside on one their webpage / us.gq.com . . i could be wrong.

The headlines on the cover are set on Foundry Gridnik Bold, also used for some section headings on the inside.

I'd swear I've seen an article someplace about the redesign after Fred Woodward took over as Design Director. I'll keep looking...

Just thought I'd cross reference this post with similar ones:
here and here. Might be useful to have them all in the same thread someday.