update docs

README.rst

@@ -122,27 +122,32 @@ GitHub Repository (the hard way)
 4. Install openTEPES via pip by ``pip install .``
 
 Solvers
-###########
+#######
 
 GLPK
-================================
+=====
 As an easy option for installation, we have the free and open-source `GLPK solver <https://www.gnu.org/software/glpk/>`_. However, it takes too much time for large-scale problems. It can be installed using: ``conda install -c conda-forge glpk``.
 
 CBC
-================================
+=====
 The `CBC solver <https://github.com/coin-or/Cbc>`_ is our recommendation if you want a free and open-source solver. For Windows users, the effective way to install the CBC solver is downloading the binaries from `this link <https://www.coin-or.org/download/binary/Cbc/Cbc-2.10.5-x86_64-w64-mingw32.zip>`_, copy and paste the *cbc.exe* file to the PATH that is the "bin" directory of the Anaconda or Miniconda environment. It can be installed using: ``conda install -c conda-forge coincbc``.
 
 Gurobi
-================================
+======
 Another recommendation is the use of `Gurobi solver <https://www.gurobi.com/>`_. However, it is commercial solver but most powerful than GLPK and CBC for large-scale problems.
 As a commercial solver it needs a license that is free of charge for academic usage by signing up in `Gurobi webpage <https://pages.gurobi.com/registration/>`_.
 It can be installed using: ``conda install -c gurobi gurobi`` and then ask for an academic or commercial license. Activate the license in your computer using the ``grbgetkey`` command (you need to be in the university domain if you are installing an academic license).
 
 Mosek
-================================
+=====
 Another alternative is the `Mosek solver <https://www.mosek.com/>`_. Note that it is a commercial solver and you need a license for it. Mosek is a good alternative to deal with QPs, SOCPs, and SDPs problems. You only need to use ``conda install -c mosek mosek`` for installation and request a license (academic or commercial).
 To request the academic one, you can request `here <https://www.mosek.com/products/academic-licenses/>`_. Moreover, Mosek brings a `license guide <https://docs.mosek.com/9.2/licensing/index.html>`_. But if you are request an academic license, you will receive the license by email, and you only need to locate it in the following path ``C:\Users\(your user)\mosek`` in your computer.
 
+GAMS
+=====
+The model openTEPES can also be solved with GAMS and a valid GAMS license for a solver. The GAMS interface is not included in the openTEPES package and must be installed separately.
+This option is activated by calling the model with the solver name 'gams'.
+
 Get started
 ###########
 

doc/rst/Download.rst

@@ -14,6 +14,9 @@ Gurobi, HiGHS, or SCIP  solvers can be installed as a package::
   pip   install                highspy
   conda install -c conda-forge pyscipopt
 
+The model openTEPES can also be solved with GAMS and a valid GAMS license for a solver. The GAMS interface is not included in the openTEPES package and must be installed separately.
+This option is activated by calling the model with the solver name 'gams'.
+
 Besides, it also requires the following packages:
 
 - `Pandas <https://pandas.pydata.org/>`_ for inputting data and outputting results