I think it is a definite possibility

you may not get all the features photoshop CS6 has (I use Elements 9) But it all has most of the features. There is another program you might want to try if Gimp won't do what you need and that is called inkscape (personally I don't like it) but a lot of people do and you get some pretty cool effects with it. I am useless at gimp but the interface is more or less the same I have not used it much because I prefer elements. Paint shop pro is also good but a bit slow to use nowadays

I hope this has helped you

Regards

Karl