From the FreeImage license (FIPL) rather than the GPL, either is applicable which given your choice of MIT for your code, would be the more appropriate:
3.6. Distribution of Executable Versions.
You may distribute Covered
Code in Executable form only if the
requirements of Section 3.1-3.5 have
been met for that Covered Code, and if
You include a notice stating that the
Source Code version of the Covered
Code is available under the terms of
this License, including a description
of how and where You have fulfilled
the obligations of Section 3.2. The
notice must be conspicuously included
in any notice in an Executable
version, related documentation or
collateral in which You describe
recipients' rights relating to the
Covered Code. You may distribute the
Executable version of Covered Code
under a license of Your choice, which
may contain terms different from this
License, provided that You are in
compliance with the terms of this
License and that the license for the
Executable version does not attempt to
limit or alter the recipient's rights
in the Source Code version from the
rights set forth in this License. If
You distribute the Executable version
under a different license You must
make it absolutely clear that any
terms which differ from this License
are offered by You alone, not by the
Initial Developer or any Contributor.
You hereby agree to indemnify the
Initial Developer and every
Contributor for any liability incurred
by the Initial Developer or such
Contributor as a result of any such
terms You offer.