GflAX (the ActiveX version of GFL SDK) dll file is not working properly on the copy of VB6 that I have installed on my Windows 7 Home Premium x64 laptop computer. It is giving the error:
Run-time error '429'
ActiveX component cant' create object
I think this is some kind of bug you'll need to fix so it will work properly on modern computers.
Also important to note is that your warning about not using LZW compression without a license, which you have in your readme file in the SDK, is no longer valid. Unisys, the company that had the patent for this compression algorithm has now put it in the public domain. In fact, that happened way back in 2003. Read about it in this article article http://www.kyzer.me.uk/essays/giflzw/
Note the article is written in a sort of humorous "tongue in cheek" kind of way, referring to it as if the patent had "died". But yeah, that gets the point across, that it really is no longer patented.