In order to learn PS like this photog, is GIMP enough?

[dRebelXT]

Very interesting albums.. But with only GIMP can I PS to the degree like he did?

http://www.pbase.com/digitalgee/root

 

[night86mare]

i don't see antyhing particularly challenging to do in photoshop, actually. but i have not used gimp before, so i'm not sure what features it has compared to photoshop. if the basic framework is the same, then it is sufficient.

 

[cy_j]

Think so, not much effects I see so far.