You don’t need to use the full name.
The name should be sufficient if you use GPF as in this example
GPF.createProduct('BandMaths', parameters, product)
BandMaths is here the name of the operator.
In the help you can find a list of some operators, the basic ones.
But if you go on the command line you can type gpt -h and get the full list of all available operators.
I think in most cases it is possible to guess which processor from the Desktop application maps to which operator. But by looking up the name in the about box you are sure.
Except for the subset operation, this you can’t look up. But the name is simply ‘Subset’
Sorry, I should have answered before.