Gekko 3.0 user manual


Reference last modified: 27/11 2018



Gekko Timeseries and Modeling Software is an open-source software system for handling and analyzing timeseries data, and for solving and analyzing large-scale economic models. See the Gekko homepage:


The current 3.0 version is a beta version. So the current version is not completely stable yet, and the user should keep that in mind if using it for serious purposes. Not all of the capabilities of Gekko 2.4 have been ported yet. See the list of issues on this page:


Issues etc.: Note about Gekko 3.0 beta


The user manual contains the following chapters:


Introduction. Introductory chapter.

Gekko syntax basics. In this chapter, the syntax is described.

Gekko commands. This chapter describes in detail the purpose of the different Gekko commands, the syntax to be used, the results produced, together with examples etc.

Gekko functions. Gekko functions can be used in expressions. The input parameters and the output type is described. The functions are divided into categories.

Gekko solvers. A description of some of the Gekko solvers.

Comparison with similar software. Gekko is compared to AREMOS and EViews.

Appendix. More info on automatic translation.


The present introductory chapter contains the following sections:


New features. A list of changes in Gekko since the previous version.

Setup. How to setup Gekko on a pc.

Basic concepts. an overview of some of the main capabilities and concepts of Gekko.

Guided tour. Some step-by-step examples of doing stuff with Gekko (mostly how to solve models).

Command overview. The commands are listed by category, and you may choose to see MODE-specific versions of the this list: sim-mode or data-mode. See the chapter 'Gekko commands' for an alphabetical list of commands, and the functions section to see functions.

Filenames. How filenames and paths are handled in Gekko.

Function keys. A list of function keys like F1, F2, etc. in Gekko.

Help system. Description of the in-built help system.

Under the hood. A short section on some of the main technologies/components used in Gekko.