GSN has done a good job with acquiring modern game shows lately, but some of them, in my opinion have not lasted as long as they should have.
Million Dollar Password (CBS): 2 seasons; 2008-09
Power of 10 (CBS): 1 season; 2007-08
1 vs. 100 (NBC): 2 seasons; 2006-08
Deal or No Deal (NBC): 4 seasons; 2005-09
Are You Smarter Than a Fifth Grader? (FOX): 3 seasons; 2007-09