All genetically modified food, including soya or maize oil produced from GM soya and maize, and food ingredients, must be labelled.
The label on canned food that says GM, stands for General Motors.
The label on canned food that says GM stands for Genetically Modified. 
( z1 stand :ARG0 ( z2 label :location ( z3 food :ARG1-of ( z4 can ) ) :ARG0-of ( z5 say :ARG1 ( z6 company :name ( z7 name :op "General" :op "Motors" ) ) ) ) :ARG1 z6 )