Source code documentation
The Gekko source code is freely available (under the open-source GNU GPL licence), and it is the intention to keep the source code well-documented.
Please note that there are some differences regarding the actual source code for Gekko 2.0, and the above documentation. Above, there is also a link to the upcoming API (Application programming interface). For now, only the TimeSeries class is documented (but still, this is an important class regarding a timeseries-oriented software like Gekko).