This is just how their system documents a mileageplus award redemption. I believe there was a discussion about this somewhere else recently, but during the merger they kept UA's reservation system while keeping the backend infrastructure from CO for the loyalty program. This has the funny effect of calling some things by the CO name still. The remaining code was just the mileagecost for the fare. E = everyday (or I guess "highest level" now), and the H=00. So my guess is you paid 34,400 miles for a YN (or I guess JN) award. I know can also get a T=0 and K=000 for the milage amount, and since they "used" to have saver awards I'd assume it could also start with an S if it's an old saver award.

In terms of "GG One Help", that appears to be a lookup code for their old reference directory system that was embedded into multiple airport & reservations programs. It would contain information regarding policies, instructions for how to process certain changes/requests, as well as internal contact information for all the airports, departments, etc. Each page had a specific code assigned to it and you would enter it to bring up that reference page. My impression is that they have moved away from that system and stopped updating it in favor of a web based policy/airport contact directory. But I'm sure if you found an older UA airport agent or reservations agent they would know how to get in the DRS to see if anything still shows for that code.