You want to try and balance the rod and reel such that when you rest it on your finger it will balance within and inch or inch and a half from the tip of the grip. You can step up in size (depending on the reel) or add weight to the reel, substitue lead core line for backing, etc. These guys will be happy to sell you a variety of reels until it balances perfectly.

I like my 755 with a Cortland peach DT 5 for floating and a Teeny 130 for sinking, on Daiwa 730s, but that's also what I have. That GPX, if I recall, is going to be half a line wt over the spec weight on WF5F, maybe even more. Its a good line, but it may be more of a 6 WF than a 5, SA does that. If your wind has been like ours (15-20 with gusts above) yeah, its going to be hard to cast into the wind. Wait for the lulls. I use mine as a short distance rod, 20-30 ft. most of the time. It'll cast a lot farther than that, but it is a shortish 5 wt and wind isn't going to help.

If this is your first glass rod, you started with a good one. Enjoy!