Are the changes required to produce genetically manipulated organisms (GMOS) considered to be mutations
What is a mutation?

A mutation is any change to the DNA sequence. From wikipedia


  In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.


Whether a given alteration to the DNA sequence occurred in nature or in a lab changes nothing to the fact that we call this alteration a mutation.

How common are mutations?

Just so that you realize how common mutations are: In humans, a couple having a baby typically transmit about 40 new mutations to this baby. This mutation rate is not quite the same between women and men (see Kong et al.(2012)).

What is a GMO?

I have never seen the term "forced mutants" before but it sounds like you might have a misrepresentation of what GMOs are and esp. in your misrepresentation, you might think that there is such natural category which are GMOs and other that are non GMOs but the boundaries between the two is more than vague.

Consider for example that the vast majority of our food has been manipulated by humans through artificial selection. Check out the ancestor of modern-day corn (from Genetic Society of America; original source: teosinte.wisc.edu; thanks @John)



This evolutionary change occurred via artificial selection mainly and without using modern genetic tools.