Question: Multiple variable loop question

I have a fairly easy question but I am new to Maple and can't seem to figure it out w/ Maple help or anyone online resources.  The problem is list all pairs of integers between 100 and 110 that are relatively prime.  (I think) I can make it work by doing:

for k from 100 by 1 to 110 do gcd(k, 100), gcd(k, 101) . . . ; end do

but what if the problem had said pairs of integers from 100 to 1000? I don't understand how to iterate this function for more than one variable.  Any help would be appreciated.

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