"Most GS athletes don't just do GS"
^ This.
The furthest I've gone into GS is one arm swings and long cycle with GS form for long timed sets; so my experience is pretty limited (I would like to get more serious at some point); but I read a quote somewhere that 'GS is essentially time-compressed manual labor' and that makes sense. It's comparable to something like cycling or rowing or speedskating, a high resistance endurance competition.
Anyway, the thing is that once you've spent a few years doing it it's apparently pretty easy to recover from. After all it's mostly ballistic movements with a big focus on endurance, and work capacity for those kinda movements in your hands, legs and low back are pretty much unlimited if you build up gradually. So a lot of GS athletes do other stuff on their free time. Denisov has done marathons and triathlons, Denis Vasiliev was a competitive armwrestler and powerlifter, Igor Morozov was a powerlifter, Sergei Rachinskiy set several world endurance records (I think he squatted 176x520 reps in an hour or something), Oleh Ilika does a lot of combat training, and did powerlifting and olympic weightlifting competitively. If someone 'just did GS' they'd probably look like an average guy, but pretty lean and with incredible grip strength and general endurance. Sergei Merkulin basically 'just does GS':
https://sphotos-a.xx.fbcdn.net/hphotos-ash4/383930_374786589257873_1653876408_n.jpg
That's merkulin on the right and alexander khostov (who also 'just does GS') on the left. Denis Vasiliev is in the middle, I think he's gone 450/350/500+ in powerlifting competition, and also squatted 100kg x100 reps. He weighs about 80kg and is a long cycle specialist:
http://www.youtube.com/watch?v=adJCFSFXhWo
He's done 50 reps in under 10.00 with a pair of 40s in training and something like 90 reps with 32s in 10.00 in competition.
The point is, GS alone won't give you strength in, say, strict presses or full squats, but you'd definitely have time to train those things on the side if you wanted to. Plenty of the International-Class masters of sport do a ton of getups and pistols and swings, among other things, as their general training. There was another GS thread a while back where I linked a ton of articles/notes I'd compiled on GS training, if anyone's bored and wants to dig it up....