Everyone can be vegan - just eat vegan, and maybe go further. Veganism is for everyone, in every industry, with any occupation, and situation, and any levels of awareness or ethics. Calling anyone "not real vegan" - especially knowing that being vegan is not a rewarding social position - is unnecessary demanding and even intimidating fashion among vegans, detrimental to the spread of veganism, imho. I observed it for years, and never witnessed anything good or productive resulting from it.
A genetically modified organism (GMO) is any organism whose genetic material has been altered using genetic engineering techniques (i.e., a genetically engineered organism). GMOs are used to produce medications and genetically modified foods, and are widely used in scientific research and the production of other goods.
A more specifically defined type of GMO is a "transgenic organism." This is an organism whose genetic makeup has been altered by the addition of genetic material from an unrelated organism. Typically GMOs are organisms whose genetic makeup has been altered without the addition of genetic material from an unrelated organism.