If you stay away from the stuff you can get in grocery stores (ie Gatorade....) most cycling drinks don't generally contain HFCS. Things like Cytomax, even gels and chews, while they certainly do contain sugars, are usually based on maltodextrin, plain fructose and dextrose.

I don't find that when riding that these cause sugar highs or sugar crashes - then again I'm not downing a whole bottle in one big chug either.... its a sip here and a sip there... I also only use them when I'll be on a very long or long and fast ride. I don't find its necessary if the pace is casual and I can stop and eat something when ever I feel like it. If the pace is high I don't tolerate solid foods too well though.