Legally, I'd say it would be OK (but I am not a lawyer - consult a lawyer for legal advice).
Morally, it's pretty reprehensible. If you don't like the GPL, then the "proper" solution is not to use a GPL library.
Edit: To clarify, whatever the legal standing of the GPL with respect to whether dynamic linking is allowed or not, the LGPL was specifically created with the intent of allowing dynamic linking in the case of libraries. So it seems clear to me that by choosing the GPL over the LGPL, the author of the library was doing so explicitly to disallow dynamic linking. Using a technical means to work around a legal restriction that expresses the author's explicit intent for his code is what is reprehensible, in my opinion.
For the record, I'm not personally a fan of the GPL (I prefer a more permissive license such as MIT or BSD). However, I am a huge fan of respecting the work of other developers, and if they don't want you link their library with closed-source software, then that's prerogative.