terminator_5505 on "Force single page template using a reserved term as URL parameter"

I'm using a single page template that is triggered by a url parameter by following this tutorial:
http://scratch99.com/wordpress/development/how-to-change-post-template-via-url-parameter/

my main problem is that I have to use the parameter m as example.com/?m=1
but it return a 404 error page
the parameter m is used for month in wordpress and it is a reserved term
http://codex.wordpress.org/Reserved_Terms

My question
Can I force wordpress to display my custom template with url parameter ?m=1
I don't want to use another url parameter is there anyway or a workaround to trigger a single page template using a reserved url parameter ??

thank you