Sumo Citrus - Non-GMO?

A new Citrus fruit has appeared in markets, and TPP is not certain how "new" it actually is, although the name Sumo is certainly novel.  Now TPP has looked into similar fruits (Here, here, and here) some time ago, and he is just not certain how novel as in new this fruit is.  TPP's initial reaction is that this is just a tangelo, a hybrid between a tangerine and an orange.  They also have the protrusion at the stem end of the fruit and they also have a pretty easily removed outer fruit wall.  At least one internet entry says that the sumo  is a hybrid between a mandarin and a naval orange.  But whereas mandarins are smallish this is a big fruit, and mandarins are also called "oranges", especially when they come peeled and as de-membraned sections in little cans.  So the sumo would seems to make it very similar to a tangelo, except bigger (thus the appellation suggesting large size?).  Interestingly enough the label clearly states that this is non-GMO, but how can you say that a hybrid organism is not a genetically modified organism?  Hybridization in the genus Citrus is pretty common way to genetically modify the offspring, thus the seedless clementine.  Equally stupid is the fact that the fruit has no glutin.  Now glutin is a protein found only in the endosperm of certain cereal grains and so the list of plants whose fruits lack glutin is quite long.  Seems like this is just a marketing ploy for a rather largish tangelo.  Enjoy.  

Real Life Fruit Quiz

Mrs. Phactor purchased a box of clementines the other day, but they didn't look quite right. First off they were quite round with a protruding nob on the stem end. Second the rind could be peeled away but it was quite tight. Third the network of veins around the sections wasn't evident and the sections did separate, they did not do so readily. Fourth the flesh, composed of juicy hairs, was yellow-orange, and tasted quite tart and more of orange than tangerine. Fifth most of the fruit's segments had seeds. Clementines are a hybrid and one parent is the mardarin orange/tangerine, but their fruit is flattened top to bottom with an easily removed orange rind, they have reticulate veins around the sections that are easy to remove, the sections separate easily, the flesh is orange with a sweet tangerine taste, and, as the label says, they're seedless, or nearly so. All of this leads the Phactor to think a smallish variety of tangelo, also a hybrid with a mardarin orange parent, were mislabelled (?) clementines and are giving them a bad name as they are not nearly as good. This citrus, whatever it is, has arrived only lately in several of our local midwestern markets. Have you any other opinions or ideas?
The decision was made to return them and the impertinent clerk, who had no idea who he was dealing with, wanted to know how anyone would know they weren't clementines? There are times one dusts off the PhD and pulls rank.