I tried to implement it, but the result is an overlapped graph

this is my script

gretl console: type 'help' for a list of commands
? clear
? set verbose off
? open denmark -q
Read datafile C:\Program Files\gretl\data\misc\denmark.gdt
? bundle options = defbundle("FONT_SIZE", 10, "PLOT_HEIGHT", 700)
? # Call various gretl plots and store each one as a gnuplot-file (mimetype "*.gp")
? gnuplot IBO --output=tf1.gp --time-series --with-lines { set title "foo" ; set yrange[0:0.5]; \
  set ylabel "ylabel"; }
The symbol ';' is not valid in this context

? gnuplot IBO --output=tf1.gp --time-series --with-lines { set title "foo" ; set yrange[0:0.5]; \
  set ylabel "ylabel"; }
The symbol ';' is not valid in this context

? gnuplot IBO --output=tf1.gp --time-series --with-lines { set title "foo" ; set yrange[0:0.5]; set ylabel "ylabel"; }

? gnuplot IBO --output=tf1.gp --time-series --with-lines { set title "foo" ; set yrange[0:0.5]; set ylabel "ylabel"; }

? gnuplot IDE --output=tf2.gp --time-series --with-lines { set title "foo" ; set xlabel "xlabel"; }

? qqplot IBO --output=tf3.gp
? freq IDE --plot=tf4.gp

? # Multiplot with 4 rows + png output
? string Gin = multiplot(defarray("tf1.gp","tf2.gp","tf3.gp","tf4.gp"), "Denmark.png", 4,  , options)
> Gin = multiplot(
The symbol 'multiplot' is undefined
? include multiplot.gfn
multiplot 0.1, 2020-06-20 (Sven Schreiber and Artur Tarassow)
? string Gin = multiplot(defarray("tf1.gp","tf2.gp","tf3.gp","tf4.gp"), "Denmark.png", 4,  , options)
? string Gin = multiplot(defarray("tf1.gp","tf2.gp","tf3.gp","tf4.gp"), "Denmark.png", ,  , options)
? string Gin = multiplot(defarray("tf1.gp","tf2.gp","tf3.gp","tf4.gp"), "Denmark.pdf", ,  , options)