\usemodule[gantt]
%\usemodule[gantt][alternative=mp]
%\usemodule[gantt][alternative=tikz]
\setuppagenumbering[location=]

\starttext
  \startgantt{3}{12}
    \startganttitle
      \titleelement{Jan}{1}
      \titleelement{Feb}{1}
      \titleelement{Mar}{1}
      \titleelement{Apr}{1}
      \titleelement{May}{1}
      \titleelement{Jun}{1}
      \titleelement{Jul}{1}
      \titleelement{Aug}{1}
      \titleelement{Sep}{1}
      \titleelement{Oct}{1}
      \titleelement{Nov}{1}
      \titleelement{Dec}{1}
    \stopganttitle
    \ganttbar{Task 1}{0}{2}
    \ganttbarcon{a consecutive task}{2}{4}
  \stopgantt
\stoptext
