How to determine if two subgroups of $GL(n,q)$ are conjugated

Question

I want to know if there is any known result that determine whether or not two subgroups $H$ and $K$ of $GL(n,q)$ (the general linear group over the finite field with $q$ elements) are conjugated. For the case in which both $H$ and $K$ are cyclic with generators h and k respectively, this question is reduced to see if $xI−h$ and $xI−k$ have the same Smith's Normal Form, but in general this reasoning do not work because every element of $H$ could be conjugated to an element in $K$, but $H$ and $K$ could not be in the same conjugation class. Thanks for any cooperation.