First of all, remove the battery. That's primarily for safety reasons, but it will also reduce your overall bike weight by anywhere from 8 to 12 pounds.
Second, stands are rated assuming the load is evenly distributed, i.e., centered on the stand. Since most seat posts aren't centrally located, you need to adjust for this factor.
Third, there are dozens (hundreds?) of DIY options that are much cheaper than commercially produced models. Do a search on Google or YouTube for "DIY bike stand" and you can pore over the choices.
Fourth, unless you buy from a reputable brand (such as Park), I'd reserve a certain amount of skepticism for whatever the manufacturer claims as a maximum load.
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Personally, I'm considering buying the Bikehand 110-pound model. It gets decent customer reviews. There are cheaper alternatives, but all of them have issues that I'm not willing to deal with.
If you can afford the $40 more, I'd recommend this one:
(Structurally, the Park stand is more than strong enough to handle your GP2. However, it's base won't be wide enough to be stable when you load it. You may need to sandbag or otherwise secure the legs in order to prevent tipping.)
EDIT: If my biking future was longer, I'd invest in a Park stand. However, at my age (68), I'm looking at the twilight years of my bike riding experience. I just need something to get me through the next ten years or so.
