I certainly agree with you--I don't need a GUI. However, my boss and our future clients would want one. As I look at it, I'm wondering about using a web interface (maybe Mojolicious? Or Dancer)
If you go this route, know that Mojolicious is friggin' wonderful. It's a fabulous set of modules. Take a gander at Maojlicious::Lite. You can have a web framework up in about 90 seconds.