My code comes from your modifications of the GM Compiler under the GNU FDL If I remember correctly, so under those rules, as long as you are using the extended code that simply executes userscript files, and not using the files under the scripts directory that make up what my extension does on it's own then it's ok.
Though, I warn you. V:6.0 uses a modified version of that system that takes up less time. But that's not the end... I've got plans for a second system modification that may cause more of a effect of a error when you're debuging, but speeds the entire thing up.
So here are the 3 warnings:
The code is going to be modified so even if you take the code from V:6.0 there will be a better version out and trust me... unless you know the steps I take and the regex replaces I use to convert my code, you will be in for a hell of a lot of trouble trying to convert your code to the code used in V:7.0.
Every version of the GLC before 6.0 is a Time Hog... and The upgrades in 6.0 do improve it, but they don't improve it all that much, V:7.0 should be fully optimized.
My last warning is in the use of the code. You half to know where to update things when you add/change things. Prefrences half to be added in the ___.js file under the preferences folder. If you use my options panel (Though, I'm kinda fond of it, so it would be nice If you thought up your own options panel layout.) You will half to update the list of preferences, and add something to change it. And the options half to be used in the script-compiler.js file (In V:6.0 you half to add it to the list instead of puting it in a useable spot).
And I do have a request or two.
In my code I use "glc_gmCompiler" and in V:6.0 I also use "glcPrefs" please replace the glc in those codes (And anywhere else in my extension that you find GLC with the naming you use for your extension), this is because I do not want your extension to break mine or vice versa if anyone installs both, glc is my name area.
And obviously going with common ediquete you list in your contributors list anyones code that you modify to create your extension.
Oh, and you may be combining your codes together. But I do admit, one or two of them may be similar to something on the glc. I've got a alternate sidebar customizer on the GLC, it can add things to the sidebar and it can alter the color/image that is used on it. And upgraded version of that is planned with a bit of extra syntax to. And the avatar alterer already provides a quick size fix.
Nah, I don't need the subdomains, I'm fine with keeping the subdomain I already have, I don't feel like having people looking at my site as a subsite of yours. And besides, I already have enough publicity, My site is host to the Gaia Layout Archive, the most popular logo maker is archiving his stuff on my site and he's even posting a link to the site every time he posts up the fact that he's made a new one, in the most popular layout changing thread on gaia.