We've heard it referred to as Google Wallet, Google Checkout, Google Payments, and now GBuy. Google has long been rumored to be working on a payments system to rival eBay-owned PayPal, and according to Forbes--which calls it GBuy--Google will be launching its online payments system on June 28. Unlike Google Payments, which was integrated into Google Base, GBuy will be intended for merchants who have their own online store, but transactions will be completed through Google's servers. Forbes quotes analyst Jordan Rohan, who says this would allow Google to "capture e-commerce transaction data, driving more precise targeting in future searches." Rohan also believes Google will mark marchants who accept payment through GBuy as "trusted GBuy merchants" when they're listed in Google search results.