# Co-prime or Not Co-prime?

$\large{\begin{cases} a &=& 100 + 85i \\ b &=& 208 + 39i \\ c &=& 188 + 22i \\ \end{cases} }$

Given that $$a$$, $$b$$, & $$c$$ are Gaussian integers as shown above, if $$d$$ is the greatest common divisor (GCD) of $$a$$, $$b$$, & $$c$$, what is the value of $$│d│^{2}$$?

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