We're generally against leaping into IPO's. If you're inclined to make that leap, though, the sources are:
Both Reuters and Barron's, in addition to the list of all upcoming IPOs, have a weekly feature on the "top" IPOs; however, these lists are only of use to institutional investors: investors without huge annual commissions (Barron's says roughly $50,000 in commissions each year) will not get a chance at the IPOs on these lists.
On the Internet, there is http://www.ipocentral.com.
Well, of course, it's impossible to comment on GOGO in particular without more information. However, you may want to consider that very many IPO's fail to hold their opening gains. In fact, many of them end up selling for far less than their offering prices within a year.
Of course, some IPO's simply soar and keep soaring. Be careful, though. Before you invest in an IPO, be sure to dig into the fate of some of the less successful newcomers. Don't get caught up in the hysteria of IPO's and come to think all of them will be the path to riches. They won't be.