Both of these series are limited edition re-paints of existing blasters. I am sad to say that neither series is available in the UK although some people (myself included) have gone to great lengths to get them. They occasionally crop up on eBay, but usually sell for silly money.
The Gear Up series was primarily released in order to promote the Vortex line prior to it's release. The blasters feature an orange and black colour scheme and the darts feature black stripes. The Gear Up series also came packaged with a single XLR disc in an effort to build interest in the Vortex series. It didn't really work as the Vortex blasters had already been sold in many stores across the US. Blasters in the Gear Up range include the Barricade RV-10, Maverick REV-6, Raider CS-35 and Recon CS-6.
The Whiteout series is my favourite and is exclusive to Walmart in the US. The blasters feature an 'Arctic' theme colour scheme consisting of white, grey, black and orange. The Deploy CS-6, Longstrike CS-6, Maverick REV-6 and Nitefinder EX-3 are all available in the Whiteout series. It is widely believed that the Whiteout series of blasters are considerably more powerful than their counterparts. Whether this is due to the blasters being made of a stronger plastic than the originals, or whether the internals are actually engineered for better performance is unknown.