When I open a .rkt file there is no markup on the source; it's all white. If I tell gedit it's a scheme file, I get the markup, but gedit doesn't seem to have an option for recognizing racket source file:(
You can go /usr/share/gtksourceview-X/language-specs/
(the X might be 3 or 4 depends on gedit's version)
Open scheme.lang
which is a XML file,
In this line
<property name="globs">*.scm</property>
Change the *.scm
to *.scm;*.rkt
Then all gtksourceview based editor, include gedit, will automatically recognize .rkt file as scheme
Bingo - Thanx ... Charlie