I know GNU GPL can only be used if my project is opensource

That seems to be a misunderstanding. When you use a GPL library, you only need to open source your own project under GPL again, if

• your project links directly to that library (as opposed to: calls a GPL program as a separate process through a mechanism like "fork & exec")

• you are going to publish your project outside of your company (internal use does not require you open your sources)

• the vendor does not provide a different, alternative license (maybe a commercial one).

So you should first check if these conditions fit to your project, for the specific library you would like to use. And about the other licenses, I think you already found out what you wanted to know.

I know GNU GPL can only be used if my project is opensource

That seems to be a misunderstanding. When you use a GPL library, you only need to open source your own project under GPL again, if

• your project links directly to that library (due to this part of the GPL FAQ, the relevant thing is how the communication between your prog and the GPLed code works)

• you are going to publish your project outside of your company (internal use does not require you open your sources)

• the vendor does not provide a different, alternative license (maybe a commercial one).

So you should first check if these conditions fit to your project, for the specific library you would like to use. And about the other licenses, I think you already found out what you wanted to know.