Ah yes, I had forgotten about that one—it’s definitely the closest font I’ve found to Triplicate, and its serif style is partially slab and partially true serif (to a similar degree to Triplicate, really).
Oh yeah, I forgot to address the other point: Go Mono doesn’t really have true italics. One or two of its letter forms are adjusted (double decker a to single decker a), but apart from that it’s just sloped roman. Look at the Triplicate specimens to see the difference, if you want. The whole shape of the character changes.