Hi Boris,
The overall recommendation is to remove the reference from your application to these libraries in the gc_Start() API call. They are not intended for use by an HMP (SIP) or HMP/DNI (PSTN) applications. This is one reason why it was not caught in system test, since our applications do not call gc_start in that manner to use those libraries since its technically not expected (or used) in HMP software. One would only use that on a SR 6.x based application in this case, but not HMP. I suspect these may have been there since you are potentially using some form of common code in your software between HMP and SR?
This goes back to our continue part of the cleanup to remove all older non used content which had been built prior on VS2005 baseline (vc 8.0), but not rebuilt for use in VS 2015 environment in the current Su baseline.
I will note that we have already made changes as well to circumvent future instances (just in case) in upcoming SU.
Jeff.