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.

• Source code documentation (Gekko 2.0)
• Example regarding upcoming API (Gekko 2.0)

Please note that there are some differences regarding the actual source code for Gekko 2.0, and the above documentation. This is because Gekko 2.0 has been developed quite a lot since the source code documentation was written, but the documentation is still a really good starting point regarding Gekko 2.0!

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).

Due to the large number of changes in syntax and underlying parsing methodology, the code regarding Gekko 2.0 has long been in a state of flux.As soon as the code stabilizes a bit more, for instance in a version 2.2, it is the intention to revise the source code documentation, and augment the API to include more classes and methods.