Yes, gimp is a Scrabble word!
...and is worth 9 points in Scrabble, and 12 points in Words with Friends
gimp
Verb
1. Walk impeded by some physical limitation or injury
Noun
1. Disability of walking due to crippling of the legs or feet
What Scrabble words can I make with the letters in gimp?
3 Letter Words
2 Letter Words