Is it better to mine solo with this hash power?
Can anyone tell me how to mine solo to only one wallet from many GPU's?
If you really meant KH/s (kilohashes/second), then you would be better off mining solo. To do that you would have to set up your own pool, which can be done by following the instructions on the README.md file from any of the open source pool forks which fluffypony already mentioned:
https://github.com/fancoder/cryptonote-universal-pool
https://github.com/sammy007/node-cryptonote-pool
https://github.com/perl5577/node-cryptonote-pool
If you meant H/s (hashes/second) and you want receive frequent payouts, then you should mine at a pool. You could still set up your own pool, but it could take several weeks to find a block depending on your luck.
And finally, if its KH/s and you still opt to mine at a pool, then it would be better for the network (and some would say that for you too) to mine at some of the smaller pools, and not one of the top.
He did say many GPUs so it can't be 200-1000 H/s. Either he's talking about a pretty big farm (several hundred GPUs) or he's confused but either way your advice was good. Also, visit the mining thread: https://bitcointalksearch.org/topic/xmr-monero-mining-653467