Gaucho1.0 does not integrate any versioning system of Pharo. It only allows manipulating Packages (adding, removing classes) as first class entities in the system, such as Classes and methods.
For Gaucho1.1 i plan to add Monticello, Metacello shapes, for versioning Gaucho/Pharo/Smalltalk models without leaving Gaucho (aka: running scripts in a Pharo workspace ). These shapes would have the same rich interactions and visual cues such as any other shape of the system.
Thanks you for the questions, as soon as i have a version of 1.1 i'll put a one click image in the web page and announce it.
Fernando.